PHY101 Solved Papers

MID TERM EXAMINATION Solved MCQS BY MEHRAN ALI SHAH PHY101- Physics Mostly from MID TERM

Q2. A net torque applied to a rigid object always tends to produce: (1 marks)

1. rotational equilibrium
2. linear acceleration
3. angular acceleration
4. rotational inertia

Correct answer: rotational equilibrium

Q3. (1 marks)

1. 12.6 rad/s
2. 1.57 rad/s
3. 2.0 rad/s
4. 6.3 rad/s

Correct answer: 2.0 rad/s

Q4. In simple harmonic motion, the restoring force must be proportional to the: (1 marks)

1. amplitude
2. frequency
3. velocity
4. displacement

Correct answer: displacement

Q5. Mercury is a convenient liquid to use in a barometer because: (1 marks)

1. it is a metal
2. it has a high boiling point
3. it expands little with temperature
4. it has a high density

Correct answer: it has a high density

Q6. The units of the electric field are: (1 marks)

1. J/m
2. J/(C·m)
3. J/C
4. J·C

Correct answer: J/m

Q7. A farad is the same as a (1 marks)

1. J/V
2. V/J
3. C/V
4. V/C

Correct answer: J/V

Q8. We desire to make an LC circuit that oscillates at 100 Hz using an inductance of 2.5H. We also need a capacitance of: (1 marks)

1. 1 F
2. 1mF
3. 1 μF
4. 100 μF

Correct answer: 100 μF

Q9. The wavelength of red light is 700 nm. Its frequency is (1 marks)

1. 4.30 * 104 Hertz
2. 4.30 * 103 Hertz
3. 4.30 * 105 Hertz
4. 4.30 * 102 Hertz

Correct answer: 4.30 * 105 Hertz

Q10. Which of the following statements is NOT TRUE about electromagnetic waves? (1 marks)

1. Electromagnetic waves satisfy the Maswell's Equation.
2. Electromagnetic waves can not travel through space.
3. The receptions of electromagnetic waves require an antenna.
4. The electromagnetic radiation from a burning candle is unpolarized.

Correct answer: The electromagnetic radiation from a burning candle is unpolarized.

Q11. Radio waves and light waves are ____________________________. (1 marks)

1. Longitudinal waves
2. Transverse waves
3. Electromagnetic and transverse both
4. Electromagnetic and longitudinal both

Correct answer: Electromagnetic and transverse both

Q12. Wien's Law states that, lmax = ________ K. (1 marks)

1. 2.90 * 10-3 Hertz
2. 2.90 * 10-3 s