ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

3 A
24 B
126 C
200 D

Question # 2

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

980 N A
580 N B
1380 N C
Zero D

Question # 3

Centripetal acceleration is also called ______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 4

Conventionally the angular velocity is directed at an angle of

90° to the axis of rotation A
30° to the axis of rotation B
0° to the axis of rotation C
None of the above D

Question # 5

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

KHz A
MHz B
GHz C
BHz D

Question # 6

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

9.42 rad/sec A
2.6 rev/sec B
1.5 rev/sec C
Both A and C D

Question # 7

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:

Radius of the circle A
Twice the radius B
Thrice the radius C
None of these D

Question # 8

A body can have constant velocity when it follows:

A circular path A
A rectilinear path B
Trajectory of a projectile C
None of these D

Question # 9

The instantaneous acceleration of a body moving with constant speed in a circle:

Remains constant A
Is called centripetal acceleration B
Tangential acceleration C
None of these D

Question # 10

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

980 N A
580 N B
1380 N C
Zero D

Question # 11

Direction of motion ______ in circular motion:

Changes off and on A
Changes continuously B
Does not change C
None of them D

Question # 12

Angular velocity is a:

Scalar quantity A
Vector quantity B
Complex quantity C
None of these D

Question # 13

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

Increase A
Decrease B
Remains constant C
None of these D

Question # 14

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

38 m/sec A
3.8 m/sec B
0.6 m/sec C
None of these D

Question # 15

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

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 16

Direction of angular momentum is determined by:

Right hand rule A
Head to tail rule B
Left hand rule C
None of them D

Question # 17

The useful unit of the angular displacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 18

The useful unit of angular replacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 19

One radian is:

Greater than one degree A
Less than one degree B
Equal to degree C
none of these D

Question # 20

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 21

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

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 22

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

49 rad/sec² A
1 rad/sec² B
0.16 rev/sec² C
Both A and C D
Both B and C E

Question # 23

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

Disc, sphere A
sphere, hoop B
Thin rod, hoop C
Hoop,disc D

Question # 24

Centripetal acceleration is also called _______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 25

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 26

In rotational motion, analogue of force F us called:

Couple A
Torque B
Mass C
Moment of intertia D

Question # 27

Centripetal acceleration is also called ______ acceleration

Tangential A
Radial B
Angular C
None of them D

Question # 28

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

Along the tangent A
Towards the centre B
Away from the centre C
None of them D

Question # 29

Centripetal acceleration is also called ________ acceleration

Tangential A
Radial B
Angular C
None of these D

Question # 30

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

0.05 m A
0.08 m B
0.8 m C
0.008 m D

Sr.#	Question	Answer
1	The number of "Earth stations" which transmit signals to satellites and receive signals from them are:	A. 3 B. 24 C. 126 D. 200
2	In case of planets, the necessary acceleration is provided by:	A. Gravitational force B. Coulomb force C. Frictional force D. None of these
3	The number of countries who manage the largest satellite system is:	A. 3 B. 24 C. 126 D. 200
4	A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:	A. 49 rad/sec² B. 1 rad/sec² C. 0.16 rev/sec² D. Both A and C
5	Centripetal force performs:	A. Maximum work B. Negative work C. Positive work D. None of these
6	Direction of angular momentum is determined by:	A. Right hand rule B. Head to tail rule C. Left hand rule D. None of them
7	A rotating body tends to be slower, when its angular acceleration is:	A. Positive B. Negative C. Zero D. Infinity
8	One radian is:	A. Greater than one degree B. Less than one degree C. Equal to degree D. none of these
9	Angular velocity is a:	A. Scalar quantity B. Vector quantity C. Complex quantity D. None of these
10	Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.	A. Disc, sphere B. sphere, hoop C. Thin rod, hoop D. Hoop,disc

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ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 5 Circular Motion

ECAT Pre General Science Physics Chapter 5 Circular Motion

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec-2comes out to be

Centripetal acceleration is also called ______ acceleration:

Conventionally the angular velocity is directed at an angle of

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

A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes:

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:

A body can have constant velocity when it follows:

The instantaneous acceleration of a body moving with constant speed in a circle:

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec-2comes out to:

Direction of motion ______ in circular motion:

Angular velocity is a:

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

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

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

Direction of angular momentum is determined by:

The useful unit of the angular displacement in SI unit is:

The useful unit of angular replacement in SI unit is:

One radian is:

One radian is equal to:

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

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

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

Centripetal acceleration is also called _______ acceleration:

One radian is equal to:

In rotational motion, analogue of force F us called:

Centripetal acceleration is also called ______ acceleration

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

Centripetal acceleration is also called ________ acceleration

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

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The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to: