NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1777 - 1781 of 2184

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Question number: 1777

» Oscillations and Waves » Displacement Relation for a Progressive Wave

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MCQ▾

Question

The equation of a progressive wave is given by where x and y are in meter and t is in second. The velocity of the wave is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1778

» Oscillations and Waves » Displacement Relation for a Progressive Wave

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MCQ▾

Question

The relation between time and displacement for two particles is given by

,

The ratio of the intensities of the waves produced by the vibrations of the two particles will be

Choices

Choice (4) Response

a.

9: 1

b.

1: 9

c.

2: 1

d.

1: 2

Question number: 1779

» Oscillations and Waves » Reflection of Waves

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Assertion-Reason▾

Question

Assertion (Ꭺ)

Sound from a tuning fork is louder when its stem is placed on a desktop

Reason (Ꭱ)

When a wave reaches another denser medium some part of it is reflected.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

Question number: 1780

» Oscillations and Waves » Wave Motion

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MCQ▾

Question

A wave of frequency 500 Hz has velocity 360 m/sec. The distance between two nearest points 60° out of phase, is

Choices

Choice (4) Response

a.

120 cm

b.

12 cm

c.

0.6 cm

d.

60 cm

Question number: 1781

» Oscillations and Waves » Simple Pendulum

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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 sec

b.

5.30 sec

c.

2.38 sec

d.

4.43 sec