In case of a forced vibration, the resonance peak becomes very sharp when the ___________

Statement: Resonance is a special case of forced vibration in which the nature and frequency of vibration of the body are the same as the impressed frequency 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.

A

Both statement and reason are true and the reason is the correct explanation of the statement

B

Both statement and reason are true but the reason is not the correct explanation of the statement

C

Statement is true, but the reason is false

D

Statement and reason are false

In case of a forced vibration, the resonance wave becomes very sharp when the ___________

A

Applied periodic force is small

B

Quality factor is small

C

Damping force is small

D

Restoring force is small

Which of the following are the basic differences between vibration signature and noise signature? 1. Vibration signature is essentially in the frequency range zero to 100 cps whereas noise signature is in the range 20 cps to 3000 cps. 2. Vibration signature has well-defined peaks whereas the noise signal is smeared. 3. The intensities of noise signatures arc much less than that of vibration signatures. 4. Detection of vibration signature calls for a microphone whereas that of noise can do with a pickup. Select the correct answer using the code given below.

A

1 and 4

B

2 and 3

C

1 and 2

D

3 and 4

In case of forced oscillation, the resonance peak becomes very sharp when the

A

Amplification is small.

B

Damping force is small.

C

Restoring force is small.

D

Quality factor is small.

In case of a forced vibration, the resonance wave becames very sharp when the

A

restoring force is small

B

applied force is small

C

quality factor is small

D

damping force is small

Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response. Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true and R is not the correct explanation of A

C

A is true but R is false

D

A is false but R is true

There is an acoustic resonance, which echoes is the fixed resonance when it is in vibration.

A

whistle

B

tuning fork

C

electric circuit

D

clarinet

In a resonance tube with tuning fork of frequency 512Hz, first resonance occurs at water level equal to 30.3cm and second resonance occurs at 63.7cm. The maximum possible error in the speed of sound is?

A

51.2 cm/s

B

102.4m/s

C

204.8cm/s

D

1536cm/s

The vibration isolation for a forced vibration system is possible, when:

A

ω/ω_n > 2^0.5

B

ω/ωn = 1

C

ω/ωn < 2^0.5

D

ω/ωn < 1

Read the given statements(s)and conclusions carefully and select which of the conclusions logically follow(s) from the statements(s). Statement: Some pins are sharp. All Sharp are metals. Conclusions: 1. All metals are pins. 2. Some metals are sharp.

A

No conclusion follow

B

Only conclusion 2 follows.

C

Only conclusion 1 follows.

D

All the conclusions follow.

In case of a forced vibration, the resonance peak becomes very sharp when the ___________

Related Questions