Bihar STET Paper 2 Physics Mock Test - 4 - Bihar PGT/TGT/PRT MCQ

Explanation:Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules"For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

Energy is supplied to the damped oscillatory system at the same rate at which it is dissipating energy, and then the amplitude of such oscillations would become constant. Such oscillations are called maintained oscillations. By the definition of maintained oscillations.

Concept:

Newton's law of gravitation: The force of attraction between any objects in the universe is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

• The force acts along the line joining the two bodies.
• The gravitational force is a central force that is It acts along the line joining the centers of two bodies.
• It is a conservative force. This means that the work done by the gravitational force in displacing a body from one point to another is only dependent on the initial and final positions of the body and is independent of the path followed.

Explanation:

• The gravitational force on mercury due to the sun is very large than that due to the earth.
• As observed from the earth, the sun appears to move around the earth in a circular orbit though, in reality, the earth moves around the sun due to gravitational force between them
• All planets move around the sun due to the huge gravitational force of the sun acting on them.
• Since the gravitational force on mercury due to the earth is smaller as compared to that on it due to the sun therefore it revolves around the sun and not around the earth.

Hence, option (3) is the correct answer.

Explanation:

Total power required to overcome a force of 165 N and to maintain a speed of 9.00 m/s

F = 165N

v = 9m/s

P = Fv = 165 x 9 = 1485 W

if each rider contribute equal power, then power required per rider will be P/2 = 1485/2 = 742.5W

Dimensional Analysis (also called Factor-Label Method or the Unit Factor Method) is a problem-solving method that uses the fact that any number or expression can be multiplied by one without changing its value. It is a useful technique.

Another use of dimensional analysis is in checking the correctness of an equation which you have derived after some algebraic manipulation. Even a minor error in algebra can be detected because it will often result in an equation which is dimensionally incorrect.

Explanation:By using the phenomenon of mutual induction, transformers allow us to easily change voltage of AC. This is necessary to cut down poer losses while supplying electricity to our homes

The joule (symbol J), is a derived unit of energy in the International System of Units.

It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre (1 newton metre or N⋅m).

In air, all the colours of light travel with the same velocity with the same velocity, but in glass, velocities of different colours are different. Velocity of red colour is largest and velocity of violet colour is smallest. Therefore, after travelling through the glass slab, red colour will emerge first.

 absence of wall W2, the time period of block would have been  But due to the presence of W₂, it alters. But for the left part of oscillation (from the mean position shown), the period will be 

For the right side part, d = A sinω t [from x = A sinω t ] 

This is the time taken by the block to reach W₂ from mean position. Collision with W₂ is perfectly elastic (given). 

Time taken for right side part of oscillation will be 

∴ Total time period is 

• As per rule, zero between two non zero digits are significant.
• The number of a significant figure in the length of the side is 4.
• So the calculated volume should be rounded off to 4 significant figures. Multiplying numbers do not increase significant figures.

Therefore, the correct answer is 4. 

The magnetic lines of force created due to current will be in such a way that on x – y plane these lines will be perpendicular. Further, these lines will be in circular loops. The number of lines moving downwards in x – y plane will be same in number to that coming upwards of the x – y plane. Therefore, the net flux will be zero.
One such magnetic line is shown in the figure.

An electric dipole is a separation of positive and negative charges. The simplest example of this is a pair of electric charges of equal magnitude but opposite sign, separated by some (usually small) distance. A permanent electric dipole is called an electret.

In free space, neither acceleration due to gravity for external torque act on the rotating solid sphere. Therefore, taking the same mass of sphere if the radius is increased then a moment of inertia, rotational kinetic energy and angular velocity will change but according to the law of conservation of momentum, angular momentum will not change.
In free space, neither acceleration due to gravity for external torque act on the rotating solid sphere. Therefore, taking the same mass of sphere if the radius is increased then a moment of inertia, rotational kinetic energy and angular velocity will change but according to the law of conservation of momentum, angular momentum will not change.

Gamma-ray photons have the highest energy in the EMR spectrum and their waves have the shortest wavelength. Scientists measure the energy of photons in electron volts (eV). X-ray photons have energies in the range 100 eV to 100,000 eV (or 100 keV). Gamma-ray photons generally have energies greater than 100 keV.

NEP 2020 emphasizes providing equal opportunities for all genders and addressing gender-based discrimination in education.

Scaffolding process in education is a teaching strategy to expedite children's learning process. Using this method, teachers first demonstrate how to deal a problem, then go back and offer support as and when required. Once basic learning is done, they give prompts, ask questions, cues to make the child learn and build the concept on what he has already learned.

Programmed instruction method is most suitable to teach heterogeneous group of students for self placed learning. Programmed instruction is a method of presenting new subject matters to students in a graded sequence of controlled steps.

Inclusive Education:

• It refers to an education system that accommodates all children regardless of their physical, intellectual, social, emotional, linguistic, or other conditions.
• It provides a provision to include disabled children along with normal children in a regular classroom environment.

An inclusive classroom refers to an education system that includes children regardless of physical, intellectual, social, linguistic, or other differently-abled conditions.

• In an inclusive classroom with diverse learners, cooperative learning, and peer-tutoring is actively promoted to facilitate peer-acceptance.
  • Cooperative learning: It refers to a heterogeneous group where students work collaboratively to achieve learning outcomes. It develops critical thinking, brainstorming, communication, and life long learning skills.
  • Peer tutoring: It refers to the learning process where fellow students teach each other. In this strategy, a higher-performing student is paired with a lower performing student to teach specific skills.
• An inclusive classroom is not limited to children with a disability but also gifted children, economically disadvantaged children, children from remote populations, children belonging to ethnic, linguistic, or cultural minorities, or children from other marginalized groups.

Therefore, Social skills development can become a positive strength for normal children in inclusive classrooms.

In explore learning phase, the students investigate the topic more thoroughly. They need not be over-directed and need to find their way to the materials. They will need some direction and the teacher can circulate, asking important questions, listening to their interactions, and ensuring that they remain on task.
The 6 E's and S (Engage, Explore, Explain, Elaborate, Evaluate, Extend, and Standards) lesson plan format was developed by teachers, in consultation with faculty from schools of education, and is based on a constructivist model of teaching. The lesson plans are based on constructivist instructional models, with activities and sections of the plan designed to have the students continually add (or construct) new knowledge on top of existing knowledge.

As the teacher is following the principles of naturalism, she will not utilise project method. This is because project method is advocated by pragmatist and is focused mainly on child-in-society concept. The methods of teaching as per the naturalist include heuristic method, play-way method, observations and experiments.

'Dyslexia' is a term known for reading disorder. The person having this disorder faces difficulty in learning to read or interpret words, letters, and other symbols, but it is not related to general intelligence. It will not have any impact on a person's general intelligence. It is a hereditary disorder that mostly runs in families. Hence, the correct answer is, 'Reading disorder.'

The instructions of a teacher must be based on the child's abilities, aptitude and interest. His ability to grasp and apply things, his natural ability to justify learning and his interest to learn a particular thing could decide the teaching strategies, as the education these days has become more child-centered. The teacher must be aware of the child's abilities, aptitude, and interest, which is possible only through proper evaluation.

The correct answer is Dynasty.

Key Points

• When members of the same family become rulers one after the other, the family is called a dynasty.
• An example of a dynasty is the Mauryan Dynasty.
• Wherein, there were three important rulers- Chandragupta, his son Bindusara, and Bindusara's son Ashoka.
• Alternative terms for dynasty are 'family', 'clan' etc.

 Thus, we can say that Dynasty is when members of the same family become rulers one after the other.

Additional Information

•  Empire is a political construct in which one state dominates over another state or a series of states.

Kurt Lewin was a well known magnetic analyst who is presently seen as the father of social brain research. Lewin explains the individual behaviour on the basis of life-space. An individual's life-space depends on his psychological force. It includes the person; his drives, tensions, thoughts and his environment, which consists of perceived objects and events.

80 men × 40 = 50 women × 40
80 men = 50 women
1 man : 1 woman = 5 : 8

Hence, Option D is correct.

for a given AP, the Nth term is:
a(n) = a + (n-1) x d
a(17) = a + (17−1) x d
a(17) = a + 16 x d
a(10) = a+9(d)
a(17) – a(10) = 7
(a + 16 x d) − (a + 9 x d) = 7
7 x d = 7
d = 1