Bihar STET Paper 2 Physics Mock Test - 6 - Bihar PGT/TGT/PRT MCQ

The velocity at P is in the X-direction (given).

After P, the positively charged particle gets deflected in the x – y plane toward – y direction and the path is non-circular.

Since in option (b), electric field is also present therefore it will also exert a force in the + X direction.
The net result of the two forces will be a non-circular path.
Only option (b) fits for the above logic. For other option, we get some other results.

In calcite crystal there is a phenomenon of double refraction. So, we see one dot as a stationary object whereas the other being refracted at a little displaced position seems to be rotating about the first dot.

Zener Diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. By passing a small current through the diode from a voltage source, via a suitable current limiting resistor (RS), the zener diode will conduct sufficient current to maintain a voltage drop of Vout.

Conduction of electrons in a conductor.
The motion of electrons is random but in presence of external electric field, they slowly drift opposite to  and cause a current
 

CONCEPT:

• Conservative force: A force is conservative if the work done by the force in displacing an object from one point to another point is independent of the path followed by the object and depends only on the endpoints.
• Electrostatic forces, gravitational forces, elastic forces, magnetic forces, etc and are examples of conservative forces.

• Non-conservative forces: A force is said to be non-conservative if work done by or against the force in moving a body from one position to another, depends on the path followed between these two positions.
• Examples:  Frictional force, Viscous force, Airdrag, etc.

EXPLANATION:

• Suppose a particle starts at A and a force F_ext is acting on it. The particle is moved around the loop using the same force, F_ext
• Suppose the particle eventually ends up at A itself then the entire displacement of the particle is zero which means the total work done is zero.
• A total work of one zero means there is no expenditure of energy which means the total energy is conserved. Hence statement p is correct
• The total displacement of a particle in a closed loop is zero, which means the total work done is zero. Hence statement q is correct.
• The total mechanical energy of a system is given by 

⇒ Total energy = Potential Energy + Kinetic energy

• From the statement p, it is clear that if the total work done is zero it means the energy is conserved.
• Which means Gain in kinetic energy = Loss in Potential Energy. Hence option r is correct.

d=8.94 cm or
d=8.94x10^-2

Using the equation for the critical angle
θ=arcsin(n₂/n₁)
45^o= arcsin(1/n₁) à n₁=1/sin45o= √2

From the figure,
γ= α,
so,
sin β/sin γ à sin β=n₁sin γ/n₂ à
β=arcsin(n₁.sin γ/n₂)=arcsin(√2sin30^o/1)=arcsin(√2/2)à β=45^o

Effective voltage is also known as root mean square value of voltage of alternating current in an AC circuit.
we know, E_rms=E_peak/ √2 
where E_rms  denotes the rms voltage and E_peak peak voltage in an ac circuit.
here, peak voltage , E_peak =423 volts
so, effective voltage , E_rms  =423/√2  ≈ 300 volts
hence, effective voltage is 300 volts
The correct answer is option C.

The result of an addition or subtraction in the number having different precisions should be reported to the same number of decimal places as present in the number having the least number of decimal places.

The final result should, therefore, be rounded off to one decimal place, i.e. 663.8

Electric potential is a pure Scalar quantity, The reason is as follows.
The Electric Potential is defined as the amount of work-done per unit positive charge to bring from infinity to that point under the influence of the primary charge only.
U=W/q
And work done is defined as the dot product of force and displacement which is a scalar quantity.
W=F.S
Thus Electric potential is a scalar quantity.

Saturation current is the maximum current possible and it will be directly proportional to the number of number of electrons falling on collector plate per second which depend on number of photons
 incident on the cathode as one photon contribute in one electron and the number of photons is actually
 proportional to intensity which varies 
As intensity I∝1/r2​, where r is the distance 
So the correct graph will be decreasing with power2 of distance and it will be rapidly decreasing with a higher value of r.
 

Projectile motion is a natural phenomenon it is due to the gravity in earth surface .it doesn't need any external force .The flight seems to be same as an projectile motion but it differs as an external force is applied which is the aircraft engine which pulls the craft forward and hence oppose the force of gravity.

multiply the mass / volume value by 1000

• Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, X-rays and radio waves. For the diffraction of wave, an obstacle or aperture of the size of the wavelength of the wave is needed.
• Since the wavelength of the radio waves is large and comparable with the size of the obstacles around which they bend. So it shows maximum diffraction.

At point P, 
E=E₁​−E₂​ rightward
⟹E=(kq/x^2​)−(kq/(l−x)²​)   where k=1/4πϵo​ 
⟹E=kq (l(l−2x)​/x²(l−x)²) 
From graph we can see that it can't be straight line and E=0 at x=l/2​
At x=0 ,,E→∞  and at x=l, E→−∞
Hence, from the shown graphs the correct answer is (D).
 

According to kinetic theory of gases, 0K is that temperature at which for an ideal gas the internal energy is zero because at 0K nearly all molecular motion stops.

Explanation:
Mass of troly M = 200Kg
mass of child m = 20Kg
speed of trolley v = 36Km/hr=36 x 5/18 = 10m/s
Let v' be the final velocity of the trolley with respect to the ground.
Final velocity of the boy with respect to the ground = v,−4
from conservation of linear momentum

Time taken by the boy to run t = 10/4 = 2.5 sec
Distance moved by the trolley = vt = 10.36 x 2.5 = 25.9 m

All children love to play. Play is a natural instinct of children. It is the natural expression of their needs. It develops the physical, cognitive, social, and emotional growth of a child. Friederich Froebel, the pioneer in childhood education, was of the view that the education of young children should be based on play. He believed that creative play had to be designed so that it could be transformed into creative work.

Advantages of the Play-way method of teaching in a classroom are as follows:

• Playing games is a natural instinct with young children. They not only participate in the games spontaneously, but they can also organize the game effectively.
• Children can create a new game; they devise the rules for playing the game and observe strictly the self-created discipline.
• This helps to nurture the creative skills of children along with the development of several life skills like problem-solving, leadership, rational thinking, self-expression, communication skills, cooperative learning, group living, etc.
• Learning becomes a natural, joyful, and energizing experience. As play is a natural activity, instinctive and joyful, children do not feel learning as a burden and stressful but participate in it voluntarily.
• It provides sufficient scope to the children to fulfil their physical, emotional, and cognitive needs.
  • Physical development and acquisition of motor skills depend upon the maturation of the parts of the body and the opportunities available to the child to practice these skills. Play provides the child with opportunities to practice.
  • Play situations provide opportunities to handle and examine objects and explore the surroundings which help children to find answers to the questions in their minds and to understand the reason why things happen the way they do. By allowing children to play as they like, will help them in learning.
  • Play allows children to discover and learn for themselves. To discover means to find out about things and events for oneself
• It helps to build healthy student-teacher and student-student relationships. 
• In a play-way method, learning takes place through activities and learners remain active, not passive.

From the above, it is clear that all the statements mentioned in the question regarding the advantages of the play-way method are true.

Learning takes place by comparing previous knowledge and experience with the present learning experience through thinking and activities. Learning is a universal skill seen in all species. Thinking and Learning are two interwoven activities that help to develop knowledge, critical thinking, and creative thinking.

Key Points

•  Despite the addition of more specialized disciplines and subject instructors, experiential learning within each subject and investigations of relationships among different subjects will be encouraged and highlighted.
• Experiential learning will be implemented at all levels, with investigations of the connections between various disciplines as well as hands-on learning, education that incorporates the arts and sports, and pedagogy centered on telling stories, among others, as normal practices within each subject.
• Classroom activities will change to competency-based learning and teaching to address the achievement gap in learning outcomes. Additionally, the assessment instruments—including assessment "as," "of," and "for" learning—will be in line with the learning objectives, skills, and attitudes that are listed for each subject in a given class.
• Each subject's curriculum will be edited down to the fundamentals in order to allow room for critical thinking and more all-encompassing, inquiry-based, discovery-based, discussion-based, and analysis-based learning.

Hence, National Education Policy 2020 proposes that experiential learning should be encouraged to promote critical thinking. 

A disorder is a disturbance in physical or mental health or functions. It may be caused by genetic factors, disease, or trauma.

Major objective of nursing education is to help students learn better and retain maximum. Teaching essentially helps students to acquire knowledge and understanding, develop skills, attitudes, values and appreciation leading to change in behavior. The methods of teaching commonly in use can be grouped as teaching methods at the classroom setting.

Key PointsStory telling Method:

• Listening and telling stories helps children in learning language in primary classes.
• Listening to stories is of interest to children and also enhances their creativity.
• This helps the children in developing their ability to express themselves.
• In story telling method the teacher is active and the child is inactive.
• While telling story teacher express their thought in active way and students listen story in inactive way.
• In the story telling we keep incorporating our life experiences in them.

Hence, we can conclude that in story telling method the teacher is active and the child is inactive.

Additional Information

• Observation method: Observation method is one of the most important and authentic method used for data collection. The observer uses his sensory organs and observes the behavior / attitude of the people or a group.
• Question answer method: Question answer method is an instrument of data collection. The researchers most commonly use this method for collecting data.

Emotional intelligence is a type of ability to manage and understand a person's emotions. People who possess a high degree of emotional intelligence are aware of what they are feeling. People who possess a low degree of emotional intelligence remain confused about their emotions. Empathising is associated with emotional intelligence. It is the ability to understand the feelings of another person.
Hence, the correct answer is, 'Empathising.'

The National Education Policy (NEP) was approved by the Union Cabinet in July 2020 and aims to implement various improvements to the Indian educational system from the school level to the college level.

Key Points

• According to NEP 2020, Children from 3 to 18 years old will have access to a free and compulsory high-quality education.
• This implies that all children between the ages of 3 and 18 will be entitled to receive a quality education from the government, regardless of their socioeconomic status.
• Everyone has access to get-quality education for all children from the age of 3-18 years instead of 6-14 years as per the RTE 2009.

 Therefore, the Arrangement of free and compulsory education for 3-18-year-old students are the changes required to be made in RTE 2009 as per NEP 2020.

Additional Information

• Right to Education Act (RTE) provided free and compulsory education to children between the age group of 6-14 years in 2009 and enforced it as a fundamental right under Article 21-A.
• India became one of 135 countries to make education a fundamental right of every child when the Act came into force on 1 April 2010.

Traditional products from Tripura, Matabari Pera Prasad and Rignai Pachara textiles, have recently earned Geographical Indication (GI) tags, bringing the state’s total to 4 GI protected products. Matabari Pera Prasad, a sweet from Tripureswari temple, is made from milk and sugar. Rignai Pachara textiles, traditional hand-woven attire, symbolize Tripura’s cultural heritage. These products’ GI recognition highlights their significance and authenticity, attracting global attention and marketing opportunities.

Around 71 for each penny of Earth is secured with water. Earth is the main planet where water can exist in fluid structure.

The tradition of bee-keeping in Bihar is very old. The period of October to December is considered as the best to start bee-keeping because at that time number of flowering and crop plants is more. So bees will get nectar and pollen easily to increase the production of honey. There was a setback to the bee-keeping industry in the 1980s due to the disease caused by the Thai sacbrood virus.
Hence, the correct answer is, 'October to December.'