Oscillations and Waves (NEET Physics): Questions 67 - 70 of 192

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Question number: 67

» Oscillations and Waves » Resonance

MCQ▾

Question

Amplitude of a wave is represented by A=ca+bc . Then resonance will occur when

Choices

Choice (4) Response

a.

b=0&a=c

b.

b=c2

c.

b=a2

d.

Question does not provide sufficient data or is vague

Question number: 68

» Oscillations and Waves » Simple Harmonic Motion » Phase

Assertion-Reason▾

Assertion (Ꭺ)

In simple harmonic motion, the velocity is maximum, when acceleration is minimum.

Reason (Ꭱ)

Displacement and velocity of S. H. M. differ in phase by π2

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Question number: 69

» Oscillations and Waves » Simple Pendulum

Assertion-Reason▾

Assertion (Ꭺ)

The percentage change in time period is 1.5 % if the length of simple pendulum increases by 3

Reason (Ꭱ)

Time period is directly proportional to length of pendulum

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

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

Question number: 70

» Oscillations and Waves » Periodic Motion - Period Frequency

MCQ▾

Question

The kinetic energy of a particle executing S. H. M. is 16 J when it is in its mean position. If the amplitude of oscillations is 25 cm and the mass of the particle is 5.12 kg, the time period of its oscillation is

Choices

Choice (4) Response

a.

5πsec

b.

2πsec

c.

20πsec

d.

π5sec

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