Bihar STET Paper 2 Physics Mock Test - 1 - Bihar PGT/TGT/PRT MCQ

Work done=total surface x Surface tension
=2x4πr²xσ
=2x4x3.14(0.03)²x 0.05
=1.1x10^-3J

Force on a unit point charge kept at a distance r from the charge = q/r². 

Therefore, work done to bring that point charge through a small distance dr = q/r² * (-dr). Therefore, the potential of that point is = .

Voltage is induced due to change in the magnetic flux through a closed loop.
Here 
Magnetic Flux = ϕ=BA=const.
Hence
Induced EMF = dtdϕ​=0
Induced current =i=E/R=0

• The iron core of a transformer is made of Laminated silicon steel with special insulated coating to limit Eddy current loss.
• Electrical steel, also called lamination steel is specialty steel tailored to produce certain magnetic properties, such as a small hysteresis area (small energy dissipation per cycle, or low core loss) and high permeability.
  

Given that λ = 200nm, d=700nm
θ = λ/d
We know that maximum angle can be 90⁰
No of rings that can be obtained say n,

If θ is so small then −

Let the initial velocity of the body at point A is v, AB is 3 cm.

On penetrating 3 cm in a wooden block, let the body moves x distance from B to C.
For B to C:

Note: Here, it is assumed that retardation is uniform.

India's first artificial satellite was Aryabhata. Launched by soviet union on 19  April 1975

In a series RLC circuit there becomes a frequency point were the inductive reactance of the inductor becomes equal in value to the capacitive reactance of the capacitor. In other words, XL = XC.
Series Resonance circuits are one of the most important circuits used electrical and electronic circuits.
 

Velocity of efflux when the hole is at depth h, v = √(2gh).
Rate of flow of water from square hole

Rate of flow of water from circular hole

According to problem

 

d ∝ 1/r

Let ρ = density of the liquid.

 Let α = area of a cross-section of each hole.

 Volume of liquid discharged per second at a hole = αv.

 Mass of liquid discharged per second = αvρ.

 Momentum of liquid discharged per second = αv²ρ.

∴ the force exerted at the upper hole (to the right) = αρv2²

 and  the force exerted at the lower hole (to the left) = αρv1²

Net force on the tank = 2αρgh. 

According to the problem time for 20 oscillations of a pendulum 

t₁ ​= 3 9.6s,  t₂ ​= 39.9s,  t₃​ =3 9.5s

It is quite obvious from these observations that the least count by the water is 0.1s. As measurements have only one decimal place.

► Precision in measurement = least count of measuring instrument = 0.1s

► Precision in 20 oscillations = 0.1

Therefore, Precision in 1 oscillation = 0.1/ 20​= 0.005.

Let us assume a force dF is applied at P in positive x - direction. This will stretch each spring by dl inducing a spring force dFs in each spring.

Let the static deformation of the system is dx (along the x-direction). The particle is in equilibrium. So,

Using Pythagoras theorem, 

Here y is constant. 

Given:
 Mass of the particle, m = 0.1 kg
 Amplitude of SHM, A = 0.1 m
 Kinetic energy at mean position, K.E. = 8×10⁻³J
 Initial phase of oscillation, ϕ = 45^∘

The kinetic energy at the mean position is given by the formula:
KE = 1/2 mv²
At the mean position, the velocity v is maximum and is given by:
v_max = Aω
Substituting this into the kinetic energy formula gives:
K.E. = 1/2 m (Aω)²

Substituting the known values into the kinetic energy equation:
8×10⁻³ = 1/2 × 0.1 × (0.1ω)²
This simplifies to:
8 × 10⁻³ = 0.005 × (0.01ω²)
8 × 10⁻³ = 5 × 10⁻⁵ ω²
Now, solving for ω²:
ω² = 8 × 10⁻³ / 5 × 10⁻⁵ = 160
Thus,
ω = √160 = 4 radians/second

The general equation of motion for SHM is given by:
x(t) = A sin(ωt+ϕ)
Substituting the values of A, ω, and ϕ:
Convert ϕ from degrees to radians:
ϕ = 45^∘ = π/4 radians
Thus, the equation becomes:
x(t) = 0.1 sin(4t+π/4)

The SI system of units is a modern system and hence involves all the quantities that can't be derived using all the other quantities of the set. While the rest systems are old and local methods and hence are not scientifically accurate and explainable and thus only have three basic quantities while SI have 7.

Tape recorder can be used as a teaching aid by primary class teachers to teach the sounds of birds and animals to the students, make them learn rhymes, or make them hear important historical speeches.

The way in which students bring their finding to others and apply their understanding to new and unfamiliar circumstances, grows out of excitement for what they have accomplished. Student would be excited to reveal his finding.

School is a place designed to provide an adequate learning environment. In school, the opportunity a child gets to learn affects his cognitive development. The more opportunities a child gets, the better his cognition because he/she will be able to add to his/her mental capacities by learning through these opportunities. In school, during teaching-learning, many new concepts form, many new ideas develop, and many other mental processes take place.

Key Points 

• The curricular and pedagogical structure and the curricular framework for school education will therefore be guided by a 5 + 3 + 3 + 4 design, consisting of the stages:
  • Foundational (3 years of preschool + Grades 1-2):- The Foundational Stage will consist of play/activity-based learning. It will also include a focus on good behavior, courtesy, ethics, personal and public hygiene/cleanliness, teamwork, cooperation, etc. 
  • Preparatory (Grades 3- 5):-  The Preparatory Stage will transition gradually from play-based learning to more formal but interactive classroom learning, with the introduction of some (light) textbooks, in order to lay a solid groundwork across subjects, including reading, writing, speaking, physical education, art, languages, science, and mathematics.
  • Middle (Grades 6-8):- The Middle Stage will see the introduction of subject teachers for learning/discussion of the more abstract concepts in each subject that students will be ready for at this stage, across the sciences, mathematics, arts, social sciences, and humanities.
  • High school (Grades 9-12 in two phases, i.e. 9 and 10 in the first and 11 and 12 in the second) stages respectively, with an option of exiting at Class 10 and re-entering in the next phase:- The High School (or Secondary) Stage will comprise of four years of multidisciplinary study, building on the subject-oriented pedagogical and curricular style of the Middle Stage, but with greater depth, greater critical thinking, greater attention to life aspirations, and greater flexibility and student choice.

Thus, it is concluded that Primary classes (Classes I to V) will consist of  Preparatory and  Foundational Stages according to NEP, 2020.

A portfolio is a purposeful collection of student work samples, student self-assessments, and goal statements that reflect student progress. Portfolio includes all photographs, assessment sheets, and audio-visual recordings.

The NEP 2020 emphasizes the need for a learner-centric pedagogy that focuses on the individual needs and interests of each learner. It calls for a shift away from traditional teacher-centric methods that focus on rote learning and memorization.

Key Points

The NEP 2020 recommends a number of pedagogies that are learner-centric, including:

• Active learning: Active learning is a type of learning in which students are actively engaged in the learning process. This can be done through activities such as discussion, problem-solving, and hands-on learning.
• Inquiry-based learning: Enquiry-based learning is a type of learning in which students are encouraged to ask questions and to explore their own understanding of a topic. This can be done through activities such as research, experimentation, and collaboration.
• Project-based learning: Project-based learning is a type of learning in which students work on a real-world problem or project. This can help students to apply their knowledge and skills in a meaningful way.
• Innovative pedagogy: Innovative pedagogy is a pedagogy that is constantly evolving and adapting to the needs of learners. It is based on the understanding that there is no one-size-fits-all approach to learning.

Hence, we can conclude that the National Education Policy (2020) recommends pedagogies that are learner-centric.

In education process aim, content and methods are evaluated.

Evaluation is concerned with assessing the effectiveness of teaching, teaching strategies, methods and techniques. It provides feedback to the teachers about their teaching and the learners about their learning.

According to Piaget's theory, children actively construct their understanding of the world through their experiences and interactions with the environment.

The Indian Space Research Organisation (ISRO) is set to launch the European Space Agency's (ESA) Solar Study Mission Proba-3, highlighting ISRO's role as a key player in international space collaborations and missions.

The Varuna naval exercise is a biennial exercise between the Indian Navy and the French Navy. The 21st edition of the exercise, Varuna-23, was held in the Arabian Sea in September 2023. Phase II of the exercise was held from September 6 to 9, 2023.

World Wildlife Fund for Nature, INDIA is a non-governmental organisation working in the field of the wilderness preservation, and the reduction of human impact on the environment.
The others are governmental organisations.

Dachigam National Park is located 22 kilometres from Srinagar in Jammu and Kashmir.

Side of the square = √144 = 12 cm

So the answer = π × 3 × 3 = 9π cm²