MPTET Varg 1 Physics Mock Test - 1 - MPTET MCQ

The correct answer is 'persistent'.
Explanation

• Relentless: Not stopping or changing.
  • ​E.g.- My elder brother is busy in the relentless fight against crime.
• Persistent: Determined to continue doing something even though people say that you are wrong or that you cannot do it.
  • ​​E.g.- He has been a persistent critic of the president.

Hence, the correct answer is 'Persistent'.
Other Related Points

• Lenient: Not as severe or strong in punishment or judgment as would be expected.
  • ​​​E.g.- They believe that judges are too lenient with terrorist suspects.
• Intermittent: Not happening regularly or continuously; stopping and starting repeatedly or with periods in between.
  • ​​​​E.g.- Although she made intermittent movie appearances, she was essentially a stage actress.
• Merciful: Someone who is merciful is willing to be kind to and forgive people who are in their power.
  • ​​​​​E.g.- "God is merciful," said the priest.

The correct answer is "let a song be sung by him"

Explanation

• The question was in active voice and we need to change it to passive voice.
• Active Voice means the subject of the sentence is the one doing the action expressed by the verb.
  • Example: My mom cooked biryani today.
• Passive voice, the subject is the person or thing acted on or affected by the verb's action.
  • Example: Biryani has been cooked by mom.

Additional Information

• Passive voice is utilized when the practitioner of the activity isn’t known and the focal point of the sentence is on the activity and not the subject.
• Rules of passive voice: The subject changes into the object.
  • Use the third form of the verb, such as is, am, are, was, were, be or being, according to the passive voice tenses.
  • Pronouns that were once active now become passive, such as "I" becomes "me."
  • Sentences in the present, past, future and future continuous forms do not use the passive voice.
  • In the passive voice, place "by" before the subject.

The correct answer is Indore.

Explanation

• Madhya Pradesh's first bone bank is being set up at MGM Medical College, Indore.​
  • The bone bank is like an eye bank.
  • In this, the bones donated by the donor or removed during the operation are kept in a deep freezer at a temperature of -40 to -80 degrees Celsius.
  • Before this, the bones to be preserved are thoroughly tested for antigens, and infections.
  • And they are used after keeping them in a deep freezer for six months.
  • Bones broken in an accident or accident can also be replaced from a 'bone bank'.​

The Harp, Guitar, Sarangi are stringed instruments. While Flute is wind instrument.

Hence, the correct answer is Flute.

Communication is the process of information via a common system of symbols. Communication can be interactive, transactive, intentional or unintentional; it can also be verbal or nonverbal.

Information and Communication Technology (ICT)

• Information and Communication Technology (ICT) is the use of technology in information processing and communication. It deals with the use of electronic computers and computer software to convert, store, protect, process, network, transmit and retrieve information.
• Information Communication Technology (ICT) is defined as “skills around computing and communications devices, software that operates them, applications that run on them, and systems that are built with them”
• ICT is all the uses of digital technology that already exist to help individuals, businesses and organizations by using information.

Important Points

• ICT includes skills, software, applications, and systems. Knowledge of Computer Systems (hardware, networks, and software)

Computer hardware includes the physical parts of a computer, such as central processing unit (CPU), monitor, mouse, keyboard, computer data storage, graphics card, sound card, speakers, and motherboard.

On the other hand, Computer software is the set of instructions that can be stored and run by hardware, for example, System software, Operating system, applications etc.

Hence, it is clear from above that the components of ICT in the options are Hardware, Software, User, and Network.

Other Related Points There are four major categories of computer hardware:

1. Input devices: used to enter data into the computer
2. Processing devices: manipulate the data.
3. Storage devices: store data and program.
4. Output device: show results of the process.

ICT education consists of four components:

• ICT/Digital Literacy;
• ICT Infrastructure and Support Applied Technologists;
• Specialized Business and Industry use of ICT; and
• ICT Research and Development Scientists

Computer, Internet, LCD Projector lies in the large umbrella of ICT literacy.

The most important component of the teaching-learning process is Learner as all the activities and the whole process is centered and planned around him.

Important Points

Learning-centered education focuses on the learning process. Although its primary concern is on the learning of the students, all those involved in the education of students such as teachers are also co-learners with the students in the learning-centered education.

Explanation

Characteristics of learner-centered teaching and learning​:

• It stresses the importance of inquiry, observation, and investigation.
• It takes into account the learner's capabilities, capacities, and preferred learning styles.
• It uses methods like experiential learning, problem-solving, concept mapping, and creative writing.
• In this method, teachers facilitate students as a facilitator by providing them with the proper environment and materials to learn at their own pace.
• Students work in flexible, cooperative groupings to solve problems to demonstrate an understanding of the task that ensures their holistic development.
• It refers to an education system that accommodates all children regardless of their physical, intellectual, social, emotional, linguistic, or other conditions.
• It’s based on the premise that learning is a right of every child and ensuring that no child is left behind in education.
• It refers to a learning environment where the students of different backgrounds (economically disadvantaged children, children from remote populations, children belonging to ethnic, linguistic, or cultural minorities, or children from other marginalized groups, gifted and weak students) learn together in the same class.

​Thus, option 3 is correct.

Person's with Disabilities Act (PWD Act) was passed in 1995 but it came into force by 1996. It narrates about equal opportunities, protection fo rights and full participation for the Persons with Disabilities.

Explanation

• The children with special needs are provided Education, Vocational Training and Employment opportunities under the PWD act 1995.
• It provides 3% reservation for person with disabilities in the government services who are having the following disabilities:

1. Visual Impairment
2. Hearing Impairment
3. Mental Retardation
4. Mental Illness
5. Locompter Disabilities
6. Leprosy
7. Short Sightedness

• It also have the provision of Public building, rail compartments, buses, ships and aircrafts will be designed to give easy access to disabled people.
• Surveys, investigations and research shall be conducted to ascertain the cause of occurrence of disabilities.

Hence, it can be concluded that Disabilities covered under PWD Act, 1995 are 7.

The correct option is 1

The term communication is derived from the Latin word ‘communis’ meaning common- standing for sharing of ideas in common. Communication is a two-way process of reaching mutual understanding, in which participants exchange information and create and share meaning.

Explanation

• A live chat on the Internet is an example of two-way communication.
• Communication is now viewed as a two-way process in later conceptualizations.
• The receiver also serves as the sender of feedback to the transmitter to complete the communication cycle (sender).
• Two-way communication brings many benefits to your workplace, including job satisfaction and productivity, increased engagement, and better teamwork.
• Two-way communication is especially significant in that it enables feedback to improve a situation.
• Two-way communication always includes feedback from the receiver to the sender and lets the sender know the message has been received accurately.
• There are different channels to make your communication effective: instant messaging, newsfeeds, blogs and articles, newsletters, surveys, and more.

Thus, it is concluded a live chat on the Internet is an example of two-way communication.

Concept:

Surface Tension may be defined as the property of the liquid by virtue of which the free surface of the liquid at rest tends to have minimum area.

Surface tension is the elastic tendency of a fluid surface which makes it acquire the least surface area possible. Surface tension is measured in SI units of N/m (newton per meter)

The excess pressure (P_ex) inside a soap bubble is given by

• 
• where T is surface tension and R is the radius of the soap bubble

The excess pressure (P_ex) inside a liquid drop is given by

• 
• D = diameter of liquid drop.

Calculation:

Given that, Diameters of 1st drop (d₁) = 1 cm

The excess pressure (P₁) inside a liquid drop is given by:

⇒ = 4T --- (1)

Diameters of 2nd drop (d₂) = 1.5 cm

The excess pressure (P₂) inside a liquid drop is given by

⇒ --- (2)

Dividing equation 1 by 2, we get

The ratio,

Cognitive skills are the basic mental abilities that we use to think, study, and learn. It accelerates learners’ efficiency and strengthens their ability and capability in learning activities
Explanation

• The desirable outcome of learning experiences the way individuals are to act, think or feel as a result of participating in some instructional activities.
• It can be classified into three domains, viz. Cognitive, Afiective and Psychomotor.

The cognitive domain includes learning objectives that deal with the 'recall' or 'recognition' of knowledge and the development of intellectual abilities and skills. This is known as the knowledge component of educational objectives. There are six stages of cognitive learning:

Thus, it is concluded that Bloom’s taxonomy is a hierarchical organization of cognitive objectives.

The mental process you used to answer all of these questions is known as memory. It refers to the ability to retain information and reproduce it over a period of time when required to perform a cognitive task.

Explanation

• Long-term memory has been considered a storehouse of all kinds of memories.
• It refers to the memory system for the retention of large amounts of information for long periods of time.
• It is the memory system that permits us to remember events that happened many years ago, yesterday, last year, and so on.
• It is the long-term memory that allows us to remember factual information making it possible for us to learn different subjects, appear for examinations and communicate with others.
• It brings continuity and meaning to our life.
• It refers to unlimited storage of information to be maintained for long periods, even for life.
• There are two types of long-term memory: declarative or explicit memory and non-declarative or implicit memory.

Thus, it is concluded that the Long term memory stores the material for later retrieval.

→The impedance of the circuit is given by-

→When ω increases then Z decreases.
And when the impedance will decrease the current will increase as I = V/Z.
So, The bulb will glow brighter due to the increase in current.
So, the correct answer is option (2).

In the teaching-learning process, the teacher's behavior is instrumental to bringing change in the learner's learning and shaping their behavior.

Explanation

• Younger children can learn their subject faster if they are guided properly.
• Children need adults to teach, guide and support them as they grow and learn.
• Childcare providers play an important role in guiding children's behavior in positive, supportive, and age-appropriate ways.
• The most appropriate ways to guide behavior may differ from child to child and will depend on the child’s age and developmental abilities and needs.
• Positive and supportive guidance helps children as they learn self-regulation and find appropriate ways to express their wants, needs, views, and feelings.
• Guiding children’s behavior is an ongoing process.
• It provides children with appropriate and positive models of behavior and helps them to develop respect, self-regulation, self-confidence, and sensitivity as they learn and grow.
• It is needed while appropriate behavior is happening, as well as before, during, and after inappropriate behavior is displayed.
• If the child is encouraged and guided properly to try out ways in which he can learn, he may gradually develop a positive attitude which would take the sting out of learning.

Thus, it is concluded that younger children can learn their subject faster if they are guided properly.

Concept:
Centre of mass:

• The centre of mass of a body or system of a particle is defined as, a point at which the whole of the mass of the body or all the masses of a system of particle appeared to be concentrated.

The motion of the centre of mass:

• Let there are n particles of masses m₁, m₂,..., m_n.
• If all the masses are moving then,

⇒ Mv = m₁v₁ + m₂v₂ + ... + m_nv_n
⇒ Ma = m₁a₁ + m₂a₂ + ... + m_na_n
⇒
⇒ M = m₁ + m₂ + ... + m_n

• Thus, the total mass of a system of particles times the acceleration of its centre of mass is the vector sum of all the forces acting on the system of particles.
• The internal forces contribute nothing to the motion of the centre of mass.

Explanation:
Given a₁ = a₂ = a₃ = g (gravitational acceleration)

• The three balls are falling under gravity, so the acceleration of all the three balls will be equal to the gravitational acceleration.
• We know that the total mass of a system of particles times the acceleration of its centre of mass is equal to the vector sum of all the forces acting on the system of particles.

⇒ Ma = m₁a₁ + m₂a₂ + ... + m_na_n -----(1)
Where m₁, m₂,..., m_n = mass of the particles, and a_1, a₂,..., a_n = acceleration of the particles
By equation 1, the acceleration of the centre of mass of the three balls is given as,
⇒ Ma = m₁a₁ + m₂a₂ + m₃a₃
⇒
⇒
⇒ a = g

• Hence, option 3 is correct.

CONCEPT:

The equation of the trajectory of the projectile we have;

Here x is the distance, u is the initial velocity, and θ is the angle.

CALCULATION:

Given: Initial velocity,

Acceleration due to gravity, g = 10 m/s²

Now, u_x = 3, and uy = 4

Therefore the magnitude of initial velocity,

⇒

⇒

⇒ u = 5 m/s

The trajectory of the projectile is written as;

⇒

Hence, option 1) is the correct answer.

Concept:
Newton's Second Law of Motion

• According to Newton's second law of motion, force is equal to the product of mass (m) and acceleration (a).

∴ F = ma
Explanation:

• Here the total mass of the spring is 5 kg and the total force applied is 10 N, hence applying newton's second law to this system.

∴ a =

Concept:
Acceleration Due to Gravity:

• The force of attraction exerted by the earth on a body is called gravitational pull or gravity.
• We know that when a force acts on a body, it produces acceleration. Therefore, a body under the effect of gravitational pull must accelerate.
• The acceleration produced in the motion of a body under the effect of gravity is called acceleration due to gravity, it is denoted by g.
• The acceleration due to gravity on the surface of the earth is given by,

Where G = universal gravitational constant, M = mass of the earth and R = radius of the earth
Calculation:
Given - Acceleration due to gravity at height h from the surface of the earth (gh) = 1/16th (ge)

• The acceleration due to gravity on the surface of the earth is given by,

------(1)

• Acceleration due to gravity at height h from the surface of the earth -

------(2)
On dividing equations 1 and 2, we get


On square rooting both side, we get

⇒ 4R = R + h
⇒ 3R = h

Concept:

• The push or pull on an object with mass causes it to change its velocity.
• Force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction.
• The frictional force is said to be a contact force because frictional force occurs when two surfaces come in touch with each other.
• The force of friction is always exerted in a direction that opposes movement (for kinetic friction) or potential movement (for static friction) between the two surfaces.
• Friction is the force that opposes the motion of a solid object over another.
• There are mainly four types of friction
  • Static friction
  • Sliding friction
  • Rolling friction
  • Fluid friction.

Explanation:
The free-body diagram of the forces is given below. Let the acceleration of the system be a then,

Now, the equations of motion are given by,
For friction:
..............(1)
where N = mgcosθ
For motion along the plane:
; using (1)
; cancelling m from both sides & writing , we get

, since final velocity is also zero, then




x = 1 m
This is the required distance covered.

Concept:

• The work per unit of charge is defined by moving a negligible test charge between two points and is expressed as the difference in electric potential at those points.
• Formula, work done, W = P.d × q where p.d = potential difference, q = charge
• The SI unit of work done is Joule.

Calculation:

Given,

The potential difference between two points A and B, P.d = 6 V

Charge, q = 3.0 C

The work done in a moving charge, W = P.d × q

W = 6 × 3 = 18 Joule

Hence, the amount of work done in moving a charge is 18 Joule.

CONCEPT:

• The minimum energy needed to remove electrons from the metal surface is called work function (φ) of that metal.
• Mathematically it is written as

Where νo = threshold frequency, λo = threshold wavelength and c = speed of light

EXPLANATION:

Given – φ = 3.3 × 10^-19 J and h = 6.6 × 10^-34 Js

The work function is written as –

ν­_o = φ/h

The correct answer is option 2 i.e. 6.022 × 1023

• Amadeo Avogadro first proposed that the volume of a gas at a given pressure and temperature is proportional to the number of atoms or molecules, regardless of the type of gas.
• Avogadro’s number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×10²³ mol-1 and is expressed as the symbol N_A.
• The mole is defined as the amount of a substance that contains as many particles as there are atoms in 12 grams of pure carbon-12. So, 1 mol contains 6.022×10²³ elementary entities of the substance.
• Another property of Avogadro’s number is that the mass of one mole of a substance is equal to that substance’s molecular weight.

Concept:

• Bernoulli's Principle is given by Swiss physicist Daniel Bernoulli derived an expression relating the pressure to fluid speed and height in 1738.
• Bernoulli's Principle is based on the Law of conservation of energy, which can be expressed as
  ​

Explanation:

• Bernoulli's Principle states that the sum of the pressure energy, kinetic energy, and potential energy per unit volume of an incompressible, non-viscous fluid in a streamlined flow remains constant.

It can be expressed as Mathematically

Where P is pressure in the fluid, ρ is the density of the fluid, h is the mean height, g is the acceleration due to gravity.

• The above formula is based on the law of Conservation of Energy.

Other Related Points

• Law of Conservation of energy states that energy can neither be created nor destroyed it can only be transferred from one form of energy to another.
• Pressure Energy pressure energy is the energy of a fluid due to the applied pressure
• Kinetic Energy per unit volume is the type of energy that is responsible to make the particle of the fluid movement.

where M/V is density, v is the velocity of the fluid, ρ is the density of the fluid.

• Potential Energy is the type of energy possessed by a liquid by virtue of its position above the earth's surface.

​P.E per unit volume = mgh/V = ρgh

Concept:

• In the single-slit diffraction experiment: The bending phenomenon of light or diffraction causes light from a coherent source to interfere with itself and produce a distinctive pattern on the screen called the diffraction pattern.
• Diffraction is evident when the sources are small enough that they are relatively the size of the wavelength of light.
• Condition for maxima, , where m = number of orders, a = slit width, λ = wavelength of the light

Calculation:

Given,

The wavelength of light, λ = 500 nm

The number of orders, m = 2

angle, θ = 45º

The condition for the minima in a single slit diffraction experiment, asinθ = mλ

Hence, the slit width is 1.414 μm

Concept:

• For equilibrium of forces, the net force on the system should be zero.
• Here we will balance the net force in the x as well as y directions respectively.

Explanation:
Taking the components of 4 N & F₂ along the x & y directions respectively, we have

By balancing the net force along x - the direction, we have
8 + 4cos60º - F₂cos30º = 0



Now, balancing the force in the y-direction, we have
F₁ + 4sin60º - F₂sin30º = 0
F₁ = F2sin30º - 4sin60º
, putting F₂ from above, we get



Thus

Concept:

• Work (W) is said to be done by a force when the force acting on it causes the object to displace.
• Mathematically it is given by:

Where F = The magnitude of the force vector, d = The magnitude of the displacement vector
Explanation:
Given: The pull force F is applied in the antiparallel direction to the displacement of the mass on the plane.

• Referring to the diagram,
  
• So, the displacement and pulling force vectors will be in the antiparallel direction to each other as the angle between them will be 180°.

∵ θ = 180°.⇒ cos180° = -1

• So, using equation 1,
• The work done in pulling the mass M will be negative as the magnitude of the force and displacement vector can not be negative.

So, the correct answer will be option 4.

CONCEPT:

• Doppler effect in physics is defined as the increase (or decrease) in the frequency of sound, light, or other waves as the source and the observer move towards (or away from) each other.
  • Waves emitted by a source traveling towards an observer get compressed. In contrast, waves emitted by a source traveling away from an observer get stretched out.
  • Doppler Effect (Doppler Shift) was first proposed by Christian Johann Doppler in 1842.
• Doppler effect formula: When the source and the observer moving towards each other

​

Where f' = apparent frequency(Hz), f = actual frequency(Hz), v = velocity of the sound wave(m/s), vo = velocity of the observer(m/s), and vs = velocity of the sound(m/s)

CALCULATION:

Given f = 200 Hz, = 225 Hz, = 250 Hz, t = 20 sec, v_o = 0 m/sec and v = 340 m/sec

• We know that the apparent frequency is given as,

-----(1)

By equation 1 when the apparent frequency is 225 Hz,

⇒ vs1 = 38 m/sec -----(2)

By equation 1 when the apparent frequency is 250 Hz,

⇒ vs2 = 68 m/sec -----(3)

By equation 2 and equation 3 the acceleration of the car is given as,

⇒ a = 1.5 m/sec²

• Hence, option 1 is correct.

Concept:-
Theorems on Moment of Inertia
There are two important theorems on moment of inertia, which enable the moment of inertia of a body to be determined about any general axis.
1. Theorem of Parallel Axes.
2. Theorem of Perpendicular Axes.​

1. Theorem of Parallel Axes- It is a very useful theorem to relate the moment of inertia of a rigid body (either two or three dimensional) about two parallel axes, in which one passes through the centre of mass.

• Let us consider two such axes are shown in figure for a body of mass M.
  ​
• If x is the distance between the axes and and I are the respective moments of inertia about them then, these two are related by,
  

2.Theorem of Perpendicular Axes

• This theorem is applicable only to the plane bodies (two dimensional).
• The theorem states that the moment of inertia of a plane two dimensional or lamina body about an axis perpendicular to the plane of the lamina body and is equal to the sum of the moment of inertia of the laminar about an axis perpendicular to its plane and passing through the point of intersection of other two axes lying on the plane of the object.
  ​
  So, according to perpendicular axis theorem, we have

Explanation:-​

• Theorem of parallel axes is applicable for any type of rigid body whether it is a laminar (two dimensional) or three dimensional,
• while the theorem of perpendicular axes is applicable for laminar type or two dimensional bodies only.
• So, we can say that Parallel axis theorem is used to calculate the moment of inertia of three dimensional rigid body.

Zener Diode is mostly used as Voltage Regulator.
Concept:
Zener diode: A Semiconductor Diode blocks current in the reverse direction, but will suffer from premature breakdown or damage if the reverse voltage applied across becomes too high.

Zener diode as voltage regulator: The Zener diode is connected with its cathode terminal connected to the positive rail of the DC supply so it is reverse biased and will be operating in its breakdown condition. Resistor R_s is selected so to limit the maximum current flowing in the circuit.

Explanation:

• A Zener diode is used as a voltage regulator in reverse biased mode.
• The breakdown voltage in the Zener diode when connected in the reverse-biased is called Zener voltage. This Zener voltage so steady and constant, it has huge applications in circuits, most importantly, voltage regulation.

So option 3 is correct.
Other Related Points

• Half wave rectifier: A half-wave rectifier is only allowing one half-cycle of an AC voltage waveform to pass, blocking the other half-cycle. Half-wave rectifiers are used to convert AC voltage to DC voltage, and only require single diodes to construct.
• Full-wave rectifier: A full-wave rectifier converts both halves of each cycle of an alternating wave (AC signal) into a pulsating DC signal.
• LED: A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it.

Concept:

• Velocity: The rate of change of position i.e. rate of displacement with time is called velocity.
  
  
• The slope of any graph is the ratio of the vertical change between two points to the horizontal change between the same points.
• In a velocity-time graph, the velocity (v) is present on the vertical axis while time (t) on the horizontal axis, so the slope of the graph is given by
  
• Since the rate of change of velocity is termed as acceleration, the slope of a velocity-time graph gives the acceleration.

Where,
s₂ = displacement of the object at t₂
s₁ = displacement of the object at t₁
Explanation:

• As explained above the shape of a velocity versus time graph reveals pertinent information about an object's acceleration. For example, if the acceleration is zero, then the velocity-time graph is a horizontal line (i.e., the slope is zero).
• If the acceleration is positive, then the line is an upward sloping line (i.e., the slope is positive).
• If the acceleration is negative, then the velocity-time graph is a downward sloping line (i.e., the slope is negative).