physics MCQs - 11th class Chapter 07 Mcqs

1

The to and fro motion of a body about a mean position is known as:

A

Periodic motion

B

Oscillatory motion

C

Circular motion

D

Random motion

2

According to Hooke's law, the restoring force is given by:

A

F = kx

B

F = -kx

C

F = k/x

D

F = -k/x

3

In the equation F = -kx, the term 'k' is known as the:

A

Mass constant

B

Displacement constant

C

Spring constant

D

Force constant

4

For a body executing Simple Harmonic Motion (SHM), its acceleration is always directed towards the:

A

Extreme position

B

Mean position

C

Direction of velocity

D

Point of suspension

5

The maximum displacement from the mean position during an oscillation is called:

A

Frequency

B

Period

C

Amplitude

D

Wavelength

6

At the mean position during SHM, the instantaneous displacement is:

A

Maximum

B

Minimum

C

Zero

D

Infinite

7

One complete round trip of a vibrating body is defined as:

A

A period

B

A frequency

C

An amplitude

D

A vibration

8

The time required to complete one vibration is called the:

A

Frequency

B

Time Period

C

Amplitude

D

Phase

9

The number of vibrations executed by a body in one second is known as:

A

Time Period

B

Amplitude

C

Frequency

D

Phase

10

The SI unit for frequency is:

A

Second

B

Meter

C

Radian

D

Hertz (Hz)

11

Frequency (f) and Time Period (T) are related by the equation:

A

f = T

B

f = 1/T

C

f = 2πT

D

f = T/2π

12

The angular frequency (ω) is related to the linear frequency (f) by:

A

ω = f/2π

B

ω = 2π/f

C

ω = 2πf

D

ω = f

13

The projection of a particle's uniform circular motion on a diameter is an example of:

A

Damped motion

B

Forced motion

C

Simple Harmonic Motion

D

Non-periodic motion

14

In SHM, the velocity of the particle is maximum at the:

A

Extreme position

B

Mean position

C

Midway between mean and extreme

D

Any point

15

The velocity of a particle in SHM is zero at the:

A

Mean position

B

Extreme position

C

Midway point

D

t = T/4

16

In SHM, the acceleration is maximum at the:

A

Mean position

B

Extreme position

C

Point of zero velocity

D

Both B and C

17

The acceleration of a particle in SHM is zero at the:

A

Extreme position

B

Point of maximum velocity

C

Mean position

D

Both B and C

18

The equation for velocity in SHM as a function of displacement x is:

A

v = ω(x₀² - x²)

B

v = ω√(x₀ - x)

C

v = ω√(x₀² - x²)

D

v = ωx

19

The phase angle (θ) in SHM specifies the:

A

Displacement only

B

Direction of motion only

C

Displacement and direction of motion

D

Total energy

20

The time period of a horizontal mass-spring system is given by:

A

T = 2π√(k/m)

B

T = 2π√(m/k)

C

T = 2π√(m/g)

D

T = 2π√(l/k)

21

If the mass 'm' in a mass-spring system is quadrupled, the new time period T' will be:

A

T/2

B

4T

C

2T

D

T/4

22

The time period of a simple pendulum is given by the formula:

A

T = 2π√(m/g)

B

T = 2π√(l/g)

C

T = 2π√(g/l)

D

T = 2π√(m/k)

23

The time period of a simple pendulum is independent of its:

A

Length

B

Mass

C

Acceleration due to gravity

D

Both length and g

24

If the length of a simple pendulum is doubled, its time period will increase by a factor of:

A

2

B

4

C

√2

D

1/√2

25

In a system executing SHM, the total energy is:

A

Always changing

B

Proportional to amplitude

C

Proportional to time

D

Conserved

26

The potential energy of a mass-spring system is maximum at:

A

Mean position

B

Extreme positions

C

t = T/4

D

t = 3T/4

27

The kinetic energy of a mass-spring system is maximum at:

A

Mean position

B

Extreme positions

C

x = x₀/2

D

x = x₀

28

The formula for the maximum potential energy in a spring system is:

A

½kx

B

½kx²

C

½kx₀

D

½kx₀²

29

Oscillations that occur without the interference of an external force are called:

A

Damped oscillations

B

Forced oscillations

C

Free oscillations

D

Resonant oscillations

30

The frequency of free vibrations is known as the:

A

Forced frequency

B

Damped frequency

C

Resonant frequency

D

Natural frequency

31

When a system is subjected to an external periodic force, it undergoes:

A

Free vibrations

B

Forced vibrations

C

Natural vibrations

D

Damped vibrations

32

The phenomenon where the driving frequency matches the natural frequency of an oscillator is called:

A

Damping

B

Interference

C

Resonance

D

Diffraction

33

At resonance, the amplitude of the motion becomes:

A

Zero

B

Minimum

C

Extra ordinarily large

D

Constant

34

A swing being pushed regularly is an example of:

A

Damped oscillation

B

Free oscillation

C

Mechanical resonance

D

Electrical resonance

35

Tuning a radio to a specific station is an application of:

A

Mechanical resonance

B

Electrical resonance

C

Damping

D

Free oscillation

36

Oscillations in which the amplitude decreases steadily with time are called:

A

Forced oscillations

B

Free oscillations

C

Undamped oscillations

D

Damped oscillations

37

Damping in an oscillating system is primarily caused by:

A

Restoring force

B

Inertia

C

Resistive forces like friction

D

Applied periodic force

38

A practical application of damped oscillations is found in a car's:

A

Engine

B

Steering wheel

C

Shock absorbers

D

Radio

39

The total energy of a damped oscillator:

A

Increases over time

B

Remains constant

C

Decreases over time

D

Becomes zero instantly

40

The sharpness of resonance is greater when the damping is:

A

Large

B

Small

C

Zero

D

Infinite

41

A system with a fairly flat resonance curve is described as being:

A

Lightly damped

B

Critically damped

C

Heavily damped

D

Undamped

42

The period of a simple pendulum at a location where g = 9.8 ms⁻² and length is approximately 0.25 m is about:

A

0.5 s

B

1.0 s

C

2.0 s

D

4.0 s

43

In SHM, when displacement is half of the amplitude (x = x₀/2), the kinetic energy is what fraction of the total energy?

A

1/4

B

1/2

C

3/4

D

1

44

If an oscillator starts from the extreme position, its displacement is best described by:

A

A sine function

B

A cosine function

C

A tangent function

D

A linear function

45

The motion of a violin string producing sound waves is an example of:

A

Oscillation

B

Wave production

C

Vibration

D

All of the above

46

The restoring force F, and displacement x in SHM are:

A

In the same direction

B

In opposite directions

C

Perpendicular to each other

D

Unrelated

47

In the equation for SHM, a = -ω²x, the acceleration 'a' is directly proportional to:

A

-x

B

x²

C

ω

D

1/x

48

Microwave ovens cook food using the principle of:

A

Damping

B

Free oscillation

C

Resonance

D

Forced convection

49

The waves in a microwave oven have a frequency that causes resonance in:

A

Air molecules

B

Metal molecules

C

Water and fat molecules

D

Glass molecules

50

For a simple pendulum, the restoring force is provided by the component of weight that is:

A

Parallel to the string

B

Tangent to the path of motion

C

Equal to the tension

D

mg cosθ