how to pass in physics board exams , here are some few Important Theory Questions of **paper-1** that could make you pass or help you to score near 50% plus marks in your 12^{th} physics board exams.

Important Questions of **physics paper 1** to go with while appearing for class 12 board exams

**1 ^{st} Chapter – Circular motion**

Q1. Relation between linear Velocity and Angular Velocity?

Q2. Difference between centripetal force and centrifugal force?

Q3. Show
that the **angle of banking** is
independent of mass of vehicle?

Q4. Obtain
expression for Time **Period (T)** of
conical Pendulum?

**3 ^{rd} Chapter – Rotational Motion**

Q1. Derive Expression for **Kinetic energy** of a rigid rotating body about an axis?

Q2. Obtain Expression for **Torque** acting on a rotating body about an axis?

Q3. State and prove Theorem/principle of **Parallel** axes?

Q4. State and prove Theorem/principle of **Perpendicular** axes?

Q5. Expression for **angular momentum** of a rotating body?

Q6. Principle of **Conservation**
of angular momentum?

**4 ^{th} Chapter – Oscillations **

Q1. Obtain differential Equation of linear S.H.M?

Q2. Obtain expression for period of Simple Pendulum?

Q3. State laws of Simple pendulum?

**5 ^{th} Chapter – Elasticity**

In this chapter you have to do all topics

**6 ^{th} Chapter – Surface tension**

Q1. Obtain an Expression, for the rise of a liquid in a capillary tube?

Q2. Define angle of Contact? Characteristics of it? Diagrams?

Q3. What is capillarity? Give some applications of it?

**7 ^{th} Chapter – Wave Motion **

Q1. Explain production of Beats? Deduce analytically the expression for beats frequency?

Q2. Explain what is Doppler Effect? Applications of it?

Q3. Derive expression for one dimensional simple harmonic waves travelling towards +ve X-axis?

**8 ^{th} Chapter – Stationary waves**

Q1. Explain the formation of stationary waves by analytical method? What are nodes and antinodes?

Q2. State and explain laws of vibrating strings? Explain End Correction?

Q3. Explain Resonance with example? Its merits? Demerits?

Q4. With neat diagram explain fundamental mode of an air column in a pipe when?

- Pipe is open at both ends.
- Pipe closed at one end.

*Note – “In this chapters many distinguishes are there
so refer compulsorily that as well students.”*

**9 ^{th} Chapter – Kinetic theory of gases & Radiation**

Q1. Write assumptions of Kinetic theory of gases?

Q2. Explain Perfectly Black Body?

Q3. State Kirchhoff’s law of radiation and give its theoretical proof?

Q4. Explain Newton’s law of cooling? Stefan’s Law?

Q5. Derive an expression for pressure exerted by gas on basis of Kinetic theory of gases?

Q6. Deduce Boyle’s law, using the expression for pressure exerted by the gas?

*Important questions for paper -2 click on this link*

*Note: – All above around 30 theory questions
that given does not guarantee to come as it is all in exams, but definitely few
of above questions will help you to score passing marks or near to 50-60
percent marks by inclusive of your practical exams performance…..so an example
we will consider a **tough
case**, that if you performed well in
your practical exams then you could score near to 20-25 out of 30 marks then
remaining theory if you come across with such above few questions and write
well proper points as per the requirement of the question then you can score
around 10-15 marks out of 70.*

*So 25+10=35 or 20+15 = 35 which
results to pass. *

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