Oscillations and Waves (NEET Physics): Questions 140 - 144 of 192

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Question number: 140

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The length of a second’s pendulum is 7 m. The spherical bob which is empty from inside has a mass of 150 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be

Choices

Choice (4) Response

a.

4.43 sec

b.

2.38 sec

c.

5.30 sec

d.

4 sec

Question number: 141

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

The motion of a particle is expressed by the equation a=bX , where a is the acceleration, X is the distance from the equilibrium position and b is a constant. The periodic time will be:

Choices

Choice (4) Response

a.

2πb

b.

2πb

c.

2πb

d.

2πb

Question number: 142

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

A pendulum suspended from the ceiling of a train has a period T, when the train is at rest. When the train is accelerating with a uniform acceleration a, the period of oscillation will,

Choices

Choice (4) Response

a.

Remain unaffected

b.

Decrease

c.

Become infinite

d.

Increase

Question number: 143

» Oscillations and Waves » Longitudinal and Transverse Waves

Assertion-Reason▾

Assertion (Ꭺ)

Transverse waves are not produced in liquids and gases.

Reason (Ꭱ)

Light waves are transverse waves.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

Question number: 144

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

MCQ▾

Question

A spring having a spring constant k is loaded with a mass m. The spring is cut into two equal parts and one of these is loaded again with the same mass. The new spring constant is,

Choices

Choice (4) Response

a.

2k

b.

k2

c.

k

d.

kl2

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