Question # 1

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

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KHz

MHz

GHz

BHz

When a body moves with a constant speed in a circle:

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No work is done on it

No acceleration is produced in the body

Velocity remains constant

None of these

Conventionally the angular velocity is directed to an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of the above

Which of the following pairs does not have identical dimensions?

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Torque and energy

Energy and work

Momentum and impulse

Mass and moment of inertia

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

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Increase

Decrease

Remain constant

None of these

A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

When a body moves along a circular path with constant speed, it has an acceleration, which is always directed

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Along the tangent

Towards the centre

Away from the centre

None of them

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

Angular momentum is a:

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vector quantity

Imaginary quantity

Complex Quantity

Scalar Quantity

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

Einstein's theory about gravity if better than Newton's because it gave explanation of:

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Inverse square law

Bending of light

Both A and B

None of above

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:

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KHz

MHz

GHz

BHz

A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:

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10 m

12 m

13 m

15 m

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

The number of countries who manage the largest satellite system is:

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3

24

126

200

One radian is:

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Greater than one degree

Less than one degree

Equal to degree

none of these

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