Question # 1

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is.

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Zero

Equal to real weight

2 mg

3 mg

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

Time period of simple pendulum depends upon

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Mass of pendulum

Weight of pendulum

Length of pendulum

Shape of pendulum

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

The work done is isochoric process is.

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Constant

Variable

Zero

Depend upon condition

The minimum number of correctly positioned communication satellites to cover whole populated earth is.

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2

3

100

200

Unit of acceleration is

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ms-1

ms

ms-2

m2s

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

The least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

Not change in entropy of a system after one complete Carnot cycle is.

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Positive

Negative

Zero

None of these

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

The difference between two molar capacities is equal to.

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Plank's constant

General gas constant

Molar gas constant

Boltzmann constant

The angle between x-axis, y-axis and z-axis is

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45°

60°

75°

90°

The experimental value for the velocity of sound in air is

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233 m-sec^-1

333 m-sec^-1

433 m-sec^-1

533 m-sec^-1

More details of an object can be seen with a microscope by using

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Green light

Red light

Yellow light

Blue light

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