Question # 1

The dimensional formula of toque is:

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[ML²T²]

[MLT²]

[ML^-1T^-2]

[ML^-2T^-2]

In which case application of angular velocity is useful?

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When a body is rotating

When velocity of body is in a straight line

When velocity is in a straight line

None of these

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

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Increase

Decreases

Remain the same

First 'A' then 'B'

A moving charge will gain energy due to the application of

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Electric field

Magnetic

Both of these

None of these

The primary winding of transformer has 500 turns whereas its secondary has 5000 turns The primary is connected to an a.c supply of 20 V, 50 Hz The secondary will have an output of

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200 V, 50 Hz

2 V, 50 Hz

200 V, 500 Hz

A couple produces

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Purely linear motion

Purely rotational motion

Linear and rotational motion

No motion

When boron is added as an impurity to silicon the resulting material is

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n type conductor

n type semiconductor

p-type conductor

p-type semiconductor

In an ac circuit with voltage V and current 1 the power dissipated is

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VI

1/2 VI

1/√2 VI

Depends on the phase between V and 1

Radio waves of constant amplitude can be generated with

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Rectifier

Filter

FET

Oscillator

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

Both transverse and longitudinal

The time period of a simple pendulum is 2 seconds if its length is increased by 4 times then its period becomes

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16 s

12 s

8 s

4 s

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