# AP Inter 1st Year Physics Model Paper Set 3 with Solutions

Thoroughly analyzing AP Inter 1st Year Physics Model Papers Set 3 helps students identify their strengths and weaknesses.

## AP Inter 1st Year Physics Model Paper Set 3 with Solutions

Time: 3 Hours
Maximum Marks: 60

Section – A (10 × 2 = 20 Marks )

Note :

• Each question carries two marks.
• All are very short answer type questions.

Question 1.
What is the contribution of S.Chandra Sekhar to Physics ?

Question 2.
Distinguish between Accuracy and Precision.

Question 3.
Define Unit vector and Null vector.

Question 4.
According to Newton’s third law, every force is accompanied by an equal and opposite force. How can a movement ever take place ?

Question 5.
What is the principle behind the Carburetor of an automobile?

Question 6.
If the diameter of a soap bubble is 10 mm and its surface tension is 0.04 Nm-1, find the excess pressure inside the bubble.

Question 7.
Why gaps are left between rails on a railway track ?

Question 8.
State Newton’s law of Cooling.

Question 9.
State Boyle’s law and Charles law.

Question 10.
Pressure of an ideal gas in a container is independent of shape of the container. Explain.

Section – B (6 × 4 = 24 Marks)

Note :

• Each question carries four marks.
• All are short answer type questions.

Question 11.
Define Average Velocity and Average Speed. When does the magnitude of average velocity become equal to the average speed ?

Question 12.
Show that the trajectory of an object thrown at certain angle with the horizontal is a parabola.

Question 13.
Why are shock absorbers used in motor-cycles and cars ?

Question 14.
Distinguish between Centre of Mass and Centre of Gravity.

Question 15.
Define Angular acceleration and Torque. Establish the relation between angular acceleration and torque.

Question 16.
What is a Geo-Stationary satellite ? State its uses.

Question 17.
Explain the concept of Elastic Potential Energy in a stretched wire and hence obtain the expression for it.

Question 18.
Find the increase in temperature of aluminium rod if its length is increased by 1%. (α for aluminium = 25 × 10-6/°C)

Section – C (2 × 8 = 16 Marks)

Note :

• Answer any two of the following questions.
• Each question carries eight marks.
• All are long answer type questions.

Question 19.
State and prove law of conservation of energy in case of a freely falling body.
A machine gun fires 360 bullets per minute, and each bullet travels with a velocity of 600 m/s. If the mass of each bullet is 5 gm, find the power of the machine gun.

Question 20.
Show that the motion of a Simple Pendulum is simple harmonic and hence derive an equation for its time period. What is the length of a Seconds Pendulum on the Earth ?

Question 21.
State Second law of Thermodynamics. How is heat engine different from a refrigerator ?