Bihar STET Paper 2 Physics Mock Test - 5 - Bihar PGT/TGT/PRT MCQ

Force due to electric field will make the charged particle released from rest to move in the straight line (that of electric field). Since the force due to magnetic field is zero, therefore, the charged particle will move in a straight line.

Mass of semicircular disc = M
Suppose there is a circular disc of mass 2M, then
Moment of intertia of circular disc = ½ (2M)R²
Moment of intertia of circular disc = ½ (2M)R² = MR²
=> So, Moment of intertia of semi-circular disc = ½ MR²

Light remains confined within the core of simple optical fibre because of Total internal reflection from core cladding boundary.
Light is confined within the core of a simple optical fiber by. If light hits a boundary of a material of lower refractive index at a steep enough angle, it cannot get out and it's reflected back into the high index medium, as in the figure below.
An optical fibre is a thin rod of high-quality glass. Very little light is absorbed by the glass.Optical fibres can carry more information than an ordinary cable of the same thickness. The signals in optical fibres do not weaken as much over long distances as the signals in ordinary cables.
Total internal reflection. When light traveling in an optically dense medium hits a boundary at a steep angle (larger than the critical angle for the boundary), the light is completely reflected. This effect is used in optical fibers to confine light in the core.
The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.
 

Path difference = (l1 + l3) – (l2 + l4)
for destructive interference
Path difference = (2n + 1) λ/2
from (1) and (2)
(l1 + l3) – (l2 + l4) = (2n + 1) λ/2

Let the horizontal displacement of the plank, at an instant during its oscillation is x and its velocity is v.

(b) Distance between the hostel and the station = 10 km = Displacement of the car

∴ Average velocity = 

A freely falling body observes a constant downwards force of gravity which hence applies a constant downward acceleration upon the body.

According to the question, there can be two cases in which the point mass is at a distance a from the surface of the spherical shell. 

1. The point mass is at the center of the shell

2. The point mass is outside the shell at a distance 2a from  the center of the shell.

Superposition principle dictates that the potential and field at any point will be the sum of the potentials and fields respectively at that point due to the individual masses.

It can be seen that in both the cases, neither field nor potential is zero inside the shell. This is due to the contribution of the point mass.

The electric field lines are perpendicular to the equipotential surface. The field lines can not intersect each other because the electric force can not have two directions at a point.

As seen from the image, in the direction of magnetic field

mgsinθ=il×B
mgsinθ=ilB

Let mass of the block be m.

Frictional force in rest position F = mg sin 30⁰

[This is static frictional force and may be less than the limiting frictional force]

We know that velocity is the first derivative of change in displacement wrt time, hence we get 
V = 3at²

Dimension of work and energy are the same i.e. [ML²T⁻²].
 Power = Energy/Time,
 Energy = Power × Time (in terms of hour instead of second),
 Energy = Watt × Hour,
= [ML²T⁻³] [T],
= [ML²T⁻²].
But, Momentum(p) = Mass × Velocity,
 p = [M] [LT⁻¹],
 p = [MLT⁻¹].
Hence the Dimension of work, energy and watt-hour is the same i.e. [ML²T⁻²] but the dimension of momentum is different ([MLT⁻¹]).

According to the question, the resultant field is inclined at 45o with earth's magnetic field.
tanθ=B_H​​/B
θ=45^o
tanθ=1=B_H​​/B
B_H​=B= μ_o​M​/4πr³
Given, B= 0.42×10⁻⁴T
M=5.25×10⁻²J/T
Therefore,0.42+10⁻⁴=10⁻⁷×[(5.25×10⁻²)/r³]​
r³=12.5×10⁻⁵=125×10⁻⁶
r=5×10⁻²m = 5 cm

Young's Modulus of elasticity =stress/strain
Y= [F/a/△l/l] ​ or Y= [Fl​/a△l]
or △l= [Fl/aY] ​= Fl​/ πr²Y
In the given problem, △l∝ l​/ r²
When both l and r are doubled, △l is halved.

The direction of the induced current is as shown in the figure, according to Lenz’s law which states that the indeed current flows always in such a direction as to oppose the change which is giving rise to it.

Electromagnetic force on electron will be zero V×B=0
Electrostatic force will be F_e​=−E backward, hence electron decelerate and velocity will decrease in magnitude.

The earth's magnetic field is Be​ and its horizontal and vertical components are H_e​ and H_v​
cosθ= H_e​​/B_e​
∴cos60^o= (​0.26×10^−4​/ B_e )T
⇒B_e​=(​0.26×10⁻⁴)/ (½)​=0.52×10⁻⁴T=0.52G

Over the years the term ‘Inclusive Education’ has come to replace the term ‘Integrated Education’. Many people working in the field of education consider these two terms to be meaning the same thing. They understand it as only a change in terminology. But the term inclusive education means much more than integrated education. Integration and mainstreaming are the terms used over the years to denote the shift to stop the segregation of children with disabilities for the purpose of education.

Key Points

• Mainstreaming: Initially, an attempt was made to implement the vision of providing education to children with disabilities in the regular stream of education. According to this, special schools prepared the child with a disability to earn the placement option. Those children who were ‘ready’ got shifted to the regular system of education from the special setup. Readiness here refers to the ability of the child to cope up with the academic and social demands of the school. This process was referred to as mainstreaming.
• Integration: The term integration was used to describe the participation of children with disabilities in the educational program existing for children without disabilities. Here, the responsibility of participation was on the child. Classrooms and schools were not prepared to adjust to the needs and requirements of the child with regard to material or method of teaching-learning. The placement was more spatial (being in the same classroom) and temporal (at the same time).
• Inclusion: This refers to restructuring schools as communities where all children can learn in a common environment without any discrimination. The regular classroom environment is adjusted to meet the individual needs. The spatial and temporal placement as per integration is utilized to the benefit of the child through adapting curriculum, providing extra time, adapting specific methods of teaching, and giving additional adult help.

Hence, we can conclude that initially, mainstreaming of children with special needs meant special schools prepared the child with disability to earn the placement option.

Psychologist Albert Bandura is the researcher most often associated with learning through observation. He and others have demonstrated that we are naturally inclined to engage in observational learning.

It is said that a teacher is a friend, philosopher and guide because a teacher plays all these vital roles in respect of pupils. It is based on the intent and capacity that a teacher possesses, exposed to which, a student is influenced to make a positive difference in his own life as well as in the society and the world at large.

Teachers, nowadays, are promoting seminars as these are helpful in boosting students' self-confidence. Besides, they also help all the students (both listeners and the student delivering the seminar) in preparing a difficult topic easily.
A seminar is a group meeting led by an expert that focusses on a specific topic or discipline. Attending a seminar has numerous benefits, including improving communication skills, gaining expert knowledge, networking with others and renewing motivation and confidence.

Successful teachers are those who have the ability to maximise the learning potential of all students in their class. Developing positive relationships between a teacher and student is a fundamental aspect of quality teaching and student learning. In order to develop rapport with pupils, a teacher should behave with them in a democratic way, guide them, and he should have communicative ability.
Gillespie recognised that the inherent qualities of a student-teacher relationship (caring, knowing, trust and mutual respect) and a teacher's rapport with students results in a classroom environment where students are affirmed and supported to achieve their best.

NRED in NEP 2020 aims to establish a centralized repository for educational data to aid research and policymaking.

A knowledge survey is a method of evaluating the delivery of a course through the gathering of feedback from the learner on the level of the knowledge they acquired after the completion of the instruction. It usually consists of questions that cover the content of the course. The surveys evaluate student learning and content mastery at all levels: from basic knowledge and comprehension through higher levels of thinking. Knowledge surveys can serve as both formative and summative assessment tools.

Invest India will host the 27th World Investment Conference (WIC) in New Delhi from December 11-14, 2023, providing a platform for global collaboration and discussions on shaping the future of investments.

The above information can be summarized below diagram,

Therefore, the code for “was” will be “3”. 

Hence, option 4 is the correct answer.

The pattern followed is:

Hence, the correct answer is "PM".

The pattern followed here is;

15 is the wrong term that doesn't follow the pattern here.

There should be 12.5 in place of 15.

Hence, "15" is the correct answer.