EASY
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What are the differences between free and forced oscillations?

Important Questions on Sound

EASY
Why does the amplitude of a vibrating body continuously decrease during damped vibrations?
HARD
A simple harmonic oscillator of angular frequency 2 rad s-1 is acted upon by an external force F=sint NIf the oscillator is at rest in its equilibrium position at t=0, its position at later times is proportional to:
EASY

Two pendulums C and D are suspended from a wire as shown in the given figure. Pendulum C is made to oscillate by displacing it from its mean position. It is seen that D also starts oscillating. If the length of D is made equal to C, then what difference will you notice in the oscillations of D

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EASY

Two pendulums C and D are suspended from a wire as shown in the given figure. Pendulum C is made to oscillate by displacing it from its mean position. It is seen that D also starts oscillating. What is the name of the phenomenon when the length of D is made equal to C?

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EASY
What do you understand by free vibrations of a body?
EASY

Two pendulums C and D are suspended from a wire as shown in the given figure. Pendulum C is made to oscillate by displacing it from its mean position. It is seen that D also starts oscillating. Name the type of oscillation, D will execute.

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EASY
Two pendulums C and D are suspended from a wire as shown in the given figure. Pendulum C is made to oscillate by displacing it from its mean position. It is seen that D also starts oscillating. Name the type of oscillation, C will execute.
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EASY
If the differential equation given by

d2ydt2+2kdydt+ω2y=F0 sin pt

Describes the oscillatory motion of body in a dissipative medium under the influence of a periodic force, then the state of maximum amplitude of the oscillation is a phenomena of
EASY
Distinguish between the free (or natural) and forced vibrations. 
HARD
A particle, with restoring force proportional to displacement and resisting force proportional to velocity is subjected to a force.

F=F0sinωt

If the amplitude of the particle is maximum for ω=ω1 and the energy of the particle is maximum for ω=ω2 then
EASY
In case of a forced vibration, the resonance peak becomes very sharp when the
MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

EASY
What are the differences between free and damped oscillation.
EASY
Differentiate between the forced and resonant vibrations.
EASY
What are damped vibrations? How do they differ from the vibrations? Give one example of each.
HARD
A particle of mass m is attached to a spring (of spring constant k) and has a natural angular frequency ω0-An external force F(t) proportional to cosωtωω0 is applied to the oscillator. The time displacement of the oscillator will be proportional to
HARD
A light pointer fixed to one prong of a tuning fork touches a vertical plate. The fork is set vibrating at a frequency of 56 Hz and allowed to free fall. Calculate how many complete oscillation are counted when plate falls at 10 cm
EASY
Forced and resonant vibrations are the same.
EASY
Two springs of force constants K1 and K2 , respectively, are connected to a mass m, as shown. The frequency of oscillation of the mass is f . If both K1 and K2 are made four times their original values, the frequency of oscillation becomes

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MEDIUM
A metal wire of linear mass density of 9.8 g m-1is stretched with a tension of kg-wt between two rigid supports 1 m apart. The wire passes at its middle point between the poles of a permanent magnet and it vibrates in resonance when carrying an alternating current of frequency n. the frequency n of the alternating sources is