Forced Oscillations and Resonance

IMPORTANT

Forced Oscillations and Resonance: Overview

This topic covers concepts such as Forced Oscillations, Condition for Resonance, Amplitude Resonance in Forced Oscillations, Equation of Forced Oscillations, Free Oscillations, Natural Frequency of a System, Driving Frequency, etc.

Important Questions on Forced Oscillations and Resonance

MEDIUM
IMPORTANT

The amplitude for the resonance of a spring mass system is 5cm, if the angular frequency of the driving force is 100 radsec and the damping constant is 50 gmsec; then find the amplitude of the driving force.

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

EASY
IMPORTANT

When an external force is applied on an oscillating particles and reduces the amplitude of the oscillation of the particle then this is called as-

EASY
IMPORTANT

A tuning fork starts vibrating as soon as certain tune is played on speaker, this is because of property known as-

EASY
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Higher the value of damping constant higher will be amplitude at resonance.

EASY
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What is the frequency with which forced periodic oscillations oscilate?

EASY
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In a free oscillation,what happens to the amplitude,frequency and energy of the oscillating body?

HARD
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Derive a differential equation for a damped S.H.M.

HARD
IMPORTANT

A mass of 5 kg is suspended from a spring of stiffness 4000 N/m. The system is fitted with a damper with a damping ratio of 0.02. The mass is pulled down 50 mm and then released. Calculate the damped frequency.

MEDIUM
IMPORTANT

A mechanical system is oscillating at resonance with a constant amplitude. Which one of the following statements is not correct?

EASY
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Explain free and damped oscillations.

MEDIUM
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Explain forced and resonance oscillations

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

EASY
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The vibrations that can continue even after the external force is removed are called free vibrations or natural vibrations.

EASY
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Natural frequency of a body depends on the shape, size, and _____ (elasticity/intensity) of the body.

EASY
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Explain the condition for resonance in forced oscillation.

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The natural frequency of a spring block system is 1000 Hz. An external force of frequency 2000 Hz is applied in the block. What is the frequency of oscillation of the block? 

EASY
IMPORTANT

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

EASY
IMPORTANT

For resonance, the frequency of the externally applied force must be half that of the natural frequency.

EASY
IMPORTANT

For resonance, the frequency of the externally applied force must be half that of the natural frequency.