Physics MCQs

Page No. 21

Total distance travelled by a bob of the simple pendulum in one vibration is equal to________________?


aAmplitude

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bSquare of the amplitude

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c2 x amplitude

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d4 x amplitude

✓


View Answer 4 x amplitude

Electrical resonance is observed in_______________?


aRadio

✓


bMicrowave oven

✖


cBoth in radio and microwave oven

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dNeither in radio nor in a microwave oven

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View Answer Radio

The natural frequency of simple pendulum depends upon_______________?


aIt’s mass

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b It’s length

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cSquare of its length

✖


dThe square root of its length

✓



The sharpness of resonance is__________________?


aDirectly proportional to the damping force

✖


bInversely proportional to the damping force

✓


cEqual to the square of damping force

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dEqual to the square of damping force

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The phase of SHM describes________________?


aDisplacement only

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b The direction of motion only

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cBoth displacement and direction of motion

✓


d Neither displacement nor direction of motion

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The restoring force acting on the simple pendulum is given by_______________?


amg sin θ

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bmg sin θ

✓


cmg cos θ

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dmg cos θ

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View Answer mg sin θ

Which one does not work according to resonance ?


aT.V

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bRadio

✖


c Microwave oven

✖


dBulb

✓


View Answer Bulb

For what displacement the P.E becomes 1/4 of its maximum value ?


ax = x’

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bx = x’/2

✓


cx = x’/4

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d x = x(2)’/2

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View Answer x = x’/2

The displacement of SHM is written as X = X`sinθt if the displacement is written by X = Xθ sont then phase constant will be equal to_______________?


a 0°

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b45°

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c90°

✓


d180°

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View Answer 90°

The length of the second pendulum is_________________?


a100 cm

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b99 cm

✖


c99.2 cm

✓


d98 cm

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View Answer 99.2 cm

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