Natural Frequency

Q.

Soldiers are not allowed to march to cross suspension bridges. Why?

Q.

What are the methods for minimising resonance??

Q. What happens when the frequency of driving force is close to the natural frequency?

1. Reverberation
2. Resonance
3. Doppler Effect
4. Damping

Q.

(i) Name the phenomenon involved in tuning a radio set to a particular station.

(ii) Define the phenomenon named by you in part (i) above.

Q.

How do you get rid of resonance?

Q. What is meant by amplitude

Q. In a swing, if force frequency becomes ________ the natural frequency resonance occurs.

1. equal to
2. greater than
3. less than
4. twice to

Q.

________ is a consequence of Simple Harmonic Motion .

1. amplitude A, frequency ω/2π

2. amplitude A/2, frequency ω/π

3. does not represent a wave motion

4. amplitude 2A, frequency ω/4π

Q. In a swing, if force frequency becomes _______ the natural frequency, resonance occurs.

1. equal to
2. greater than
3. less than
4. twice to

Q.

When a body vibrates under a periodic force, the vibration of the body is called:

1. natural vibration

2. forced vibration

3. resonant vibration

4. damped vibration

Q. What happens when the frequency of driving force is close to the natural frequency?

1. Damping
2. Doppler Effect
3. Resonance
4. Reverberation