# 11th Class Physics Chapter 5 MCQs with Answers

Welcome to the **11th Class Physics Chapter 5 MCQs Practice and Quiz Tests**. We are presenting you with top MCQ questions from the **11th Class Physics Chapter 5 Circular Motion.**

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Which of the following quantities is a scalar quantity in circular motion?

a) Velocity

b) Speed

c) Acceleration

d) Displacement

The direction of the centripetal acceleration in circular motion is .

a) Tangential to the circle

b) Outward from the center of the circle

c) Inward toward the center of the circle

d) Perpendicular to the plane of the circle

The centripetal force acting on an object in circular motion is always directed

a) Tangential to the circle

b) Outward from the center of the circle

c) Inward toward the center of the circle

d) Perpendicular to the plane of the circle

What is the relationship between the radius of the circle (r) and the centripetal acceleration (

a) of an object in uniform circular motion?

a) a ∝ r

b) a ∝ 1/r

c) a ∝ r²

d) a ∝ 1/r²

In circular motion, the centripetal force required to keep an object moving in a circle is

provided by .

a) Gravity

b) Friction

c) Tension in a string

d) Any force acting toward the center of the circle

The time period of an object in uniform circular motion is defined as .

a) The time it takes to complete one revolution

b) The time it takes to travel half the circumference of the circle

c) The time it takes to travel one-fourth the circumference of the circle

d) The time it takes to reach maximum speed

What is the SI unit of centripetal acceleration?

a) m/s

b) m/s²

c) m/s³

d) m²/s²

When an object in circular motion travels around the circle with a constant speed, its velocity .

a) Remains constant

b) Increases

c) Decreases

d) Reverses direction

Which of the following forces is responsible for the feeling of being pushed outward when a vehicle takes a sharp turn?

a) Centripetal force

b) Frictional force

c) Tension force

d) Inertial force

The frequency of an object in circular motion is defined as .

a) The number of revolutions per unit time

b) The number of seconds taken to complete one revolution

c) The angular displacement in one second

d) The time it takes to reach maximum speed

What is the relationship between the frequency (f) and the time period (T) of an object in circular motion?

a) f ∝ T

b) f ∝ 1/T

c) f ∝ T²

d) f ∝ 1/T²

An object is moving in a circle of radius 2 meters with a constant speed of 4 m/s. What is

the centripetal acceleration of the object?

a) 8 m/s²

b) 2 m/s²

c) 4 m/s²

d) 16 m/s²

Which of the following statements is true about an object in uniform circular motion?

a) The object’s speed is increasing with time.

b) The object’s velocity is changing but not its speed.

c) The object’s velocity is constant.

d) The object’s acceleration is always directed outward from the center of the circle.

In circular motion, the acceleration is always directed toward .

a) The center of the circle

b) The tangent of the circle

c) The circumference of the circle

d) The direction of motion

What is the centripetal force required to keep an object of mass 2 kg moving in a circle of radius 3 meters with a constant speed of 5 m/s?

a) 10 N

b) 30 N

c) 20 N

d) 15 N

The angular displacement of an object in circular motion is defined as .

a) The angle between the initial and final positions of the object

b) The distance traveled by the object along the circumference of the circle

c) The time taken by the object to complete one revolution

d) The time it takes to reach maximum speed

The angular speed of an object in circular motion is defined as .

a) The number of revolutions per unit time

b) The angle traversed per unit time

c) The time taken by the object to complete one revolution

d) The distance traveled by the object along the circumference of the circle

In circular motion, what is the relationship between the angular displacement (θ) and the arc length (s) along the circle’s circumference?

a) θ ∝ s

b) θ ∝ 1/s

c) θ ∝ s²

d) θ ∝ 1/s²

The linear speed of an object in circular motion is defined as .

a) The number of revolutions per unit time

b) The angle traversed per unit time

c) The time taken by the object to complete one revolution

d) The distance traveled by the object along the circumference of the circle

In circular motion, the centripetal acceleration is directly proportional to .

a) The object’s speed

b) The object’s mass

c) The object’s radius of rotation

d) The object’s angular displacement

Which of the following statements is true about an object in non-uniform circular motion?

a) The object’s speed is constant.

b) The object’s velocity is constant.

c) The object’s velocity is changing, and its speed may be constant or changing.

d) The object’s acceleration is always directed inward toward the center of the circle.

An object is moving in a circle with an angular speed of 3 radians per second. What is the time taken by the object to complete one revolution?

a) 3 seconds

b) 2 seconds

c) 1 second

d) 6 seconds

An object is moving in a circle with an angular speed of 2 radians per second. What is the angular displacement of the object after 3 seconds?

a) 2 radians

b) 3 radians

c) 6 radians

d) 1.5 radians

In circular motion, if the centripetal force acting on an object is halved while its speed

remains constant, what will be the effect on the object’s radius of curvature?

a) It will become one-fourth of the original radius.

b) It will become one-half of the original radius.

c) It will remain unchanged.

d) It will double the original radius.

An object is moving in a circular path with a constant speed of 10 m/s. If the radius of the circle is 5 meters, what is the magnitude of the centripetal acceleration?

a) 2 m/s²

b) 4 m/s²

c) 6 m/s²

d) 8 m/s²

An object is moving in a circle of radius 4 meters with a linear speed of 6 m/s. What is the magnitude of its angular speed?

a) 2 rad/s

b) 3 rad/s

c) 1.5 rad/s

d) 0.5 rad/s

The angular acceleration of an object in circular motion is defined as .

a) The angle between the initial and final positions of the object

b) The angular displacement per unit time

c) The time taken by the object to complete one revolution

d) The rate of change of angular speed

Which of the following statements is true about centripetal force and centripetal acceleration?

a) Centripetal force and centripetal acceleration are the same physical quantity.

b) Centripetal force and centripetal acceleration have the same magnitude but different directions.

c) Centripetal force is the cause of centripetal acceleration.

d) Centripetal force and centripetal acceleration are unrelated concepts.

An object is moving in a circle of radius 2 meters with an angular speed of 3 radians per second. What is the linear speed of the object?

a) 6 m/s

b) 2 m/s

c) 3 m/s

d) 1.5 m/s

The centripetal force required to keep an object moving in a circle is inversely proportional to .

a) The object’s speed

b) The object’s mass

c) The object’s radius of rotation

d) The object’s angular displacement

An object is moving in a circle of radius 2 meters with a constant speed of 5 m/s. What is the magnitude of its centripetal acceleration?

a) 2 m/s²

b) 5 m/s²

c) 10 m/s²

d) 25 m/s²

An object is moving in a circle of radius 3 meters with an angular speed of 2 radians per second. What is the linear speed of the object?

a) 2 m/s

b) 6 m/s

c) 3 m/s

d) 9 m/s

An object is moving in a circle with an angular acceleration of 4 radians per second squared. What will be the change in its angular speed after 2 seconds?

a) 8 radians per second

b) 2 radians per second

c) 6 radians per second

d) 4 radians per second

The centripetal force required to keep an object moving in a circle is directly proportional to .

a) The object’s speed

b) The object’s mass

c) The object’s radius of rotation

d) The object’s angular displacement

An object is moving in a circle with an angular speed of 4 radians per second. What is the magnitude of its angular displacement after 5 seconds?

a) 9 radians

b) 20 radians

c) 25 radians

d) 5 radians

In circular motion, if the centripetal force acting on an object is doubled while its speed

remains constant, what will be the effect on the object’s radius of curvature?

a) It will become one-fourth of the original radius.

b) It will become one-half of the original radius.

c) It will remain unchanged.

d) It will double the original radius.

An object is moving in a circle with an angular speed of 3 radians per second. What is the magnitude of its angular displacement after 4 seconds?

a) 12 radians

b) 7 radians

c) 1.5 radians

d) 4.5 radians

An object is moving in a circle with an angular speed of 4 radians per second. What is the magnitude of its angular displacement after 2 seconds?

a) 4 radians

b) 6 radians

c) 2 radians

d) 8 radians

An object is moving in a circle of radius 3 meters with a linear speed of 9 m/s. What is the magnitude of its centripetal acceleration?

a) 3 m/s²

b) 27 m/s²

c) 81 m/s²

d) 9 m/s²

An object is moving in a circle of radius 4 meters with a linear speed of 8 m/s. What is the magnitude of its centripetal acceleration?

a) 2 m/s²

b) 16 m/s²

c) 8 m/s²

d) 32 m/s²

An object is moving in a circle with a constant centripetal acceleration of 6 m/s². What will be the effect on its speed if the radius of the circle is halved?

a) The speed will remain unchanged.

b) The speed will be doubled.

c) The speed will be halved.

d) The speed will be quadrupled.

An object is moving in a circle of radius 5 meters with a linear speed of 10 m/s. What is the magnitude of its centripetal acceleration?

a) 2 m/s²

b) 4 m/s²

c) 6 m/s²

d) 8 m/s²

An object is moving in a circle of radius 2 meters with an angular speed of 4 radians per second. What is the linear speed of the object?

a) 4 m/s

b) 8 m/s

c) 2 m/s

d) 16 m/s

An object is moving in a circle with a constant centripetal acceleration of 5 m/s². What will be the effect on its speed if the radius of the circle is doubled?

a) The speed will remain unchanged.

b) The speed will be halved.

c) The speed will be doubled.

d) The speed will be quadrupled.

An object is moving in a circle with an angular speed of 2 radians per second. What is the magnitude of its angular displacement after 3 seconds?

a) 3 radians

b) 6 radians

c) 9 radians

d) 1.5 radians

The time period of an object in circular motion is inversely proportional to .

a) The object’s speed

b) The object’s mass

c) The object’s radius of rotation

d) The object’s angular displacement

An object is moving in a circle of radius 3 meters with a linear speed of 6 m/s. What is the magnitude of its centripetal acceleration?

a) 2 m/s²

b) 4 m/s²

c) 6 m/s²

d) 8 m/s²

An object is moving in a circle with an angular acceleration of 2 radians per second squared. What will be the change in its angular speed after 3 seconds?

a) 6 radians per second

b) 2 radians per second

c) 4 radians per second

d) 8 radians per second

An object is moving in a circle with an angular acceleration of 3 radians per second squared. What will be the change in its angular speed after 4 seconds?

a) 12 radians per second

b) 2 radians per second

c) 6 radians per second

d) 4 radians per second

An object is moving in a circle with an angular speed of 3 radians per second. What is the magnitude of its angular displacement after 2 seconds?

a) 2 radians

b) 3 radians

c) 6 radians

d) 1.5 radians

The time period of an object in circular motion is defined as .

a) The number of revolutions per unit time

b) The number of seconds taken to complete one revolution

c) The angular displacement in one second

d) The time it takes to reach maximum speed

In circular motion, what is the relationship between the angular displacement (θ) and the arc length (s) along the circle’s circumference?

a) θ ∝ s

b) θ ∝ 1/s

c) θ ∝ s²

d) θ ∝ 1/s²

An object is moving in a circle with an angular speed of 5 radians per second. What is the

magnitude of its angular displacement after 4 seconds?

a) 12 radians

b) 20 radians

c) 25 radians

d) 5 radians

An object is moving in a circle with an angular acceleration of 5 radians per second squared. What will be the change in its angular speed after 3 seconds?

a) 8 radians per second

b) 2 radians per second

c) 6 radians per second

d) 4 radians per second

The time period of an object in circular motion is directly proportional to .

a) The object’s speed

b) The object’s mass

c) The object’s radius of rotation

d) The object’s angular displacement

An object is moving in a circle with an angular acceleration of 4 radians per second squared. What will be the change in its angular speed after 5 seconds?

a) 20 radians per second

b) 2 radians per second

c) 6 radians per second

d) 8 radians per second

An object is moving in a circle with a constant centripetal acceleration of 3 m/s². What will be the effect on its speed if the radius of the circle is halved?

a) The speed will remain unchanged.

b) The speed will be doubled.

c) The speed will be halved.

d) The speed will be quadrupled.

An object is moving in a circle with an angular acceleration of 6 radians per second squared. What will be the change in its angular speed after 2 seconds?

a) 8 radians per second

b) 2 radians per second

c) 12 radians per second

d) 4 radians per second

An object is moving in a circle with an angular acceleration of 3 radians per second squared. What will be the change in its angular speed after 2 seconds?

a) 6 radians per second

b) 2 radians per second

c) 12 radians per second

d) 4 radians per second

An object is moving in a circle of radius 4 meters with a linear speed of 8 m/s. What is the magnitude of its centripetal acceleration?

a) 2 m/s²

b) 16 m/s²

c) 8 m/s²

d) 32 m/s²

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