ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

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:

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

Question # 2

Angular velocity is a:

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

Question # 3

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 # 4

In case of planets, the necessary acceleration is provided by:

Gravitational force A
Coulomb force B
Frictional force C
None of these D

Question # 5

One radian is

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

Question # 6

Satellites are held in orbits around Earth by its:

Gravitational field A
Magnetic field B
Own orbital motion C
Own spin motion D

Question # 7

The center of mass of a sphere lies at:

The axis of the sphere A
Circumference of sphere B
Center of the sphere C
None of them D

Question # 8

Centripetal acceleration is also called ______ acceleration

Tangential A
Radial B
Angular C
None of them D

Question # 9

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 # 10

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

8.1 X 10⁷N A
625 N B
6250 N C
None of these D

Question # 11

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:

10 m A
12 m B
13 m C
15 m D

Question # 12

Which of the following pairs does not have identical dimensions?

Torque and energy A
Energy and work B
Momentum and impulse C
Mass and moment of inertia D

Question # 13

The useful unit of angular replacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 14

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 15

Angular momentum is a:

vector quantity A
Imaginary quantity B
Complex Quantity C
Scalar Quantity D

Question # 16

Direction of motion _________ in circular motion

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

Question # 17

Moment of linear momentum is called.

Moment arm A
Moment of inertia B
Inertia C
Angular momentum D

Question # 18

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

KHz A
MHz B
GHz C
BHz D

Question # 19

Conventionally the angular velocity is directed to 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 # 20

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

3 A
24 B
126 C
200 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 stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

22/7 A
7 B
14 C
21 D

Question # 23

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:

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

Question # 24

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 25

Moment of inertia depends upon:

Mass A
Selection of axis of rotation B
Both of them C
None of these D

Question # 26

A rotating body tends to be slower, when its angular acceleration is:

Positive A
Negative B
Zero C
Infinity D

Question # 27

Which one is related to angular motion:

Moment of a force A
Moment of inertia B
Moment of momentum C
None of these D

Question # 28

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 # 29

One radian is:

Greater than one degree A
Less than one degree B
Equal to one degree C
None of them D

Question # 30

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

Sr.#	Question	Answer
1	Which one is related to angular motion:	A. Moment of a force B. Moment of inertia C. Moment of momentum D. None of these
2	Circular motion is an example of motion in:	A. One dimension B. Two dimensions C. Three dimensions D. None of these
3	The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are	A. 3 B. 24 C. 126 D. 200
4	The useful unit of angular replacement in SI unit is:	A. Degree B. Revolution C. Radian D. Metre
5	A rotating body tends to be slower, when its angular acceleration is:	A. Positive B. Negative C. Zero D. Infinity
6	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. Radius of the circle B. Twice the radius C. Thrice the radius D. None of these
7	A body can have constant velocity when it follows:	A. A circular path B. A rectilinear path C. Trajectory of a projectile D. None of these
8	The useful unit of the angular displacement in SI unit is:	A. Degree B. Revolution C. Radian D. Metre
9	The instantaneous acceleration of a body moving with constant speed in a circle:	A. Remains constant B. Is called centripetal acceleration C. Tangential acceleration D. None of these
10	When a body moves along a circular path with constant speed, it has an acceleration, which is always directed	A. Along the tangent B. Towards the centre C. Away from the centre D. None of them

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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

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:

Angular velocity is a:

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

In case of planets, the necessary acceleration is provided by:

One radian is

Satellites are held in orbits around Earth by its:

The center of mass of a sphere lies at:

Centripetal acceleration is also called ______ acceleration

Conventionally the angular velocity is directed at an angle of

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

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:

Which of the following pairs does not have identical dimensions?

The useful unit of angular replacement in SI unit is:

One radian is equal to:

Angular momentum is a:

Direction of motion _________ in circular motion

Moment of linear momentum is called.

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

Conventionally the angular velocity is directed to an angle of:

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

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

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec2, then its angular velocity is rad/sec is:

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:

One radian is equal to:

Moment of inertia depends upon:

A rotating body tends to be slower, when its angular acceleration is:

Which one is related to angular motion:

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:

One radian is:

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

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A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

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