Question # 1

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

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3

24

126

200

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

Conventionally 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 the above

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

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KHz

MHz

GHz

BHz

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

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

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

When 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 angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

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2.5 sec

0.06 sec

15.7 sec

0.4 sec

Centripetal force performs:

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Maximum work

Negative work

Positive work

None of these

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

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Greater than

smaller than

Equal to

None of these

A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

One radian is equal to:

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30.3°

45.3°

50.3°

57.3°

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

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ECAT Physics Chapter 5 Circular Motion Online Test MCQs With Answers

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