Resonance

Q. Resonance condition occurs when the frequency of external sources matches the natural frequency of the system.

1. False
2. True

Q. Resonance is a special case of

1. damped oscillations
2. undamped oscillations
3. coupled oscillations
4. forced oscillations

Q. During the phenomenon of resonance

1. The amplitude of oscillation becomes large
2. The frequency of oscillation become large
3. The time period of oscillation becomes large
4. All of the above

Q. The example of forced vibration is

1. resonance.
2. beats.
3. interference.
4. diffraction.

Q. Assertion : In the ideal case of zero damping, the amplitude of simple harmonic motion at resonance is infinite.
Reason : All real systems have some damping.

1. If both assertion and reason are true and reason is the correct explanation of assertion.
2. If both assertion and reason are true and reason is not the correct explanation of assertion.
3. If assertion is true but reason is false.
4. If both assertion and reason are false.

Q. As amplitude of resonant vibrations decreases, degree of damping

1. increases
2. varies
3. remains same
4. decreases

Q. Pick the wrong statement:
Interference to occur:

1. frequency of one wave should be equal to another
2. one wave must superpose on another
3. amplitude of one wave should be comparable to that of another
4. frequency of two waves can never be same / equal

Q. What is resonance? By drawing the diagram of resonance tube calculate the formula for velocity of sound in air.

Q. Assertion :Resonance is a special case of forced vibration in which the natural frequency of vibration of the body is the same as the impressed frequency of external periodic force and the amplitude of forced vibration is maximum. Reason: The amplitude of forced vibrations of a body increases with an increase in the frequency of the externally impressed periodic force.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. What is meant by Resonance?