PHY101 Final Term Past Papers Mega File

PHY101

As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, a distance of 0.75m from the origin. The z component of the angular momentum around the origin is:

1. 6.0kg · m2/s
2. 9.0kg · m2/s
3. 11 kg · m2/s
4. 14 kg · m2/s

Correct answer: 6.0kg · m2/s

A net torque applied to a rigid object always tends to produce:

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

Correct answer: angular acceleration

An object attached to one end of a spring makes 20 vibrations in 10 s. Its angular frequency is:

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

Correct answer: 2.0 rad/s

In simple harmonic motion, the restoring force must be proportional to the:

1. amplitude
2. frequency
3. velocity

PHY101

1. displacement

Mercury is a convenient liquid to use in a barometer because:

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

The units of the electric field are:

1. J/m
2. J/(C·m)
3. J/C
4. J·C

Correct answer: J/m

A farad is the same as a

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

Correct answer: J/V

We desire to make an LC circuit that oscillates at 100 Hz using an inductance of

Q2. 5H. We also need a capacitance of:

1. 1 F
2. 1mF
3. 1 μF
4. 100 μF

Correct answer: 100 μF

PHY101

The wavelength of red light is 700 nm. Its frequency is ____________________.

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

Which of the following statements is NOT TRUE about electromagnetic waves?

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. Radio waves and light waves are ____________________________.
5. Longitudinal waves
6. Transverse waves
7. Electromagnetic and transverse both
8. Electromagnetic and longitudinal both

Wien's Law states that, lmax = ________ K.

1. 2.90 * 10-3 Hertz
2. 2.90 * 10-3 s
3. 2.90 * 10-3 kg
4. 2.90 * 10-3 m

Correct answer: 2.90 * 10-3 m

Interference of light is evidence that:

1. the speed of light is very large