Practice MCQ ON VIBRATION:-
(1) The potential energy of a particle executing SHM of amplitude a is equal to its kinetic energy when displacement
of the particle is-
(a) ±a (b) ± a/2 (c) ±a/4 (d) ±a/√2
Ans-d
(2) If a spring of force constant K is cut into 3 pieces then the force constant of each part is-
(a)3K (b)1 (c) K (d)K/3
Ans-a
Explaination
(3) The sharpness of a velocity resonance curve is high if the damping constant -
(a) b is medium
(b) b is small
(c) ∞
(d)none of these
Ans-b
(4)The difference between the phase of the driver and driven system at velocity resonance is-
(a) π (b)2π (c)0 (d) π/2
Ans-c
(5) in SHM the force is-
(a) constant force
(b) restoring force
(c) resisting force
(d) none
Ans-b
(6) A particle execute SHM, if its velocity is maximum, then displacement will be-
(a) minimum
(b) maximum
(c)greater than zero
(d)less than zero
Ans-a
(7) When the frequency (p) of the applied force equals to zero then the velocity amplitude V equals to-
(a)0 (b)1 (c)∞ (d)0.5
Ans-a
(8) Which of the following is represent logarithmic decrement –
(a) λ =√bT
(b)λ=b2T
(c) λ =bT
(d) λ =bT2
Ans-c
(9) In Lissagous figure, if phase difference between the two waves is π, the shape will be a-
(a) Circle
(b) ellipse
(c) straight line
(d) oblique ellipse
Ans-c
(10)Over damped motion is observed in case of-
(a) Tangent galvanometer
(b) dead beat galvanometer
(c) Electrical oscillation of LCR circuit
(d) ballistic galvanometer
Ans-b
(11) If the restoring force constant of a body is 98 Nm-1 , then restoring force of the body for displacement of 10 cm. is -
(a) 98 N (b) 9.8 N (c) 0.98 N (d) 980 N
Ans-b
(12) For large value of damping constant, the Q-factor
(a) increases
(b) decreases
(c) remains same
(d) tends to zero
Ans-a
(13) For large value of damping constant, the Q-factor-
(a) increases
(b) decreases
(c) remains same
(d) tends to zero
Ans-b
(14) A particle executing SHM if its amplitude is doubled , then which quantity will be doubled?
(a)time period
(b) total energy
(c) maximum acceleration
(d) minimum velocity
Ans-c
(15) maximum value of velocity in SHM is-
(a) aw (b) zero (c) aw^2 (d) aw/2
Ans-a
(15) kinetic energy is maximum in SHM at-
(a) at mean position
(b)at extrem position
(c)both mean and extrem position
(d)none
Ans-a
(16) In SHM average value of kinetic and potential energy is-
(a)not equal
(b) equal
(c) average kinetic energy is greater than average potential energy
(d)average potential energy is greater than average kinetic energy
Ans-b
(17) frequency is reciprocal to-
(a) time period
(b) velocity
(c) amplitude
(d) phase difference
Ans-a
(18) Which of the following is force constant unit-
(a) N .m/sec
(b) N/m
(c) dyne/m
(d) None
Ans-b
(19) oscillatory motion are-
(a) bounded motion
(b) non bounded motion
(c) preodic motion
(d)non preodic motion
Ans-a,c
(20) dimension of force constant (K) is-
(a) ML^2
(b) MLT^-2
(c) MT^-2
(d) ML^2T
Ans-c
(21) Velocity and displacement graph shape is-
(a) straight line
(b) circle
(c) ellipse
(d) hyperbola
Ans-c
(22) displacement and acceleration graph shape is-
(a) straight line
(b) circle
(c) ellipse
(d) square
Ans-b
(23)at resonance amplitude is
(a) maximum
(b) minimum
(c)zero
(d) none of these
Ans- a
(24) spring constant depends on-
(a) nature of material
(b) natural length
(c) both of above
(d)none
Ans-c
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