Question # 1

The produce oscillation, body is pulled away from its

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Mean position

Extreme position

Both a and b

None of these

A frame of reference stationed at the earth is an

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Inertial frame

None internal frame

Accelerated frame

Laboratory frame

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

Oscillation of shock absorber of a car is practical example of.

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simple harmonic motion

Forced oscillation

Damped oscillation

Undamped oscillation

The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

Computer Chips are made of

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carbon

Gemanium

Silicon

Sodium

The resultant of two forces 30 N and 40 N acting parallel to each other is.

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30 N

40 N

70 N

10 N

the angular version of F= ma is

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L = 1w

pi = 1a

l = pi a

f = mv/t

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

The distance between the consecutive nodes is

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In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

Critical angle is that incident angle in denser medium for which angle of refraction is.

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0 ^o

45 ^o

90 ^o

120 ^o

One foot is equal to

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31.90 cm

30.48 cm

30.84 cm

84.30 cm

The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

Which is the example of vector quantity

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Torque

Speed

Density

Work

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