PHY101 Final Term Solved Paper with References by VUBuddy

FINALTERM EXAMINATION · Fall 2009 · PHY101- Physics (Session - 1)

Q1. As a (1 marks)

Q2. 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. 6.0kg · m2/s
3. 9.0kg · m2/s
4. 11 kg · m2/s
5. 14 kg · m2/s

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

1. rotational equilibrium

The magnitude of the torque produced by a force is defined as ... If we consider a rigid body rotating about a fixed axis

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

Correct answer: rotational equilibrium

Q3. An object attached to one end of a spring makes 20 vibrations in 10 s. Its angular frequency is: (1 marks)

1. 2.0 rad/s
2. 12.6 rad/s
3. 1.57 rad/s
4. 2.0 rad/s
5. 6.3 rad/s

Angular Frequency is ω = Thetta / T 20/10 = 2.0

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

1. displacement f=-kx
2. amplitude
3. frequency
4. velocity
5. displacement

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

1. it has a high density other liquids are lighter than mercury, they would require much longer columns.
2. it is a metal
3. it has a high boiling point
4. it expands little with temperature
5. 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/m
3. J/(C·m)
4. J/C
5. J·C

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

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

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. 100 µF
2. 1 F
3. 1mF
4. 1 µF
5. 100 µF