Oscillations and Waves (NEET Physics): Questions 80 - 85 of 192

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Question number: 80

» Oscillations and Waves » Wave Motion

MCQ▾

Question

A tuning fork makes 256 vibrations per second in air. When the velocity of sound is 330 m/s then wavelength of the tone emitted is

Choices

Choice (4) Response

a.

0.89 m

b.

1.11 m

c.

0.56 m

d.

1.29 m

Question number: 81

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

MCQ▾

Question

A ball of the mass 10 kg hangs from a spring and oscillates with time period of 2 π seconds. If the ball is removed the spring shortens by,

Choices

Choice (4) Response

a.

2πmeters

b.

gmeters

c.

gkmeters

d.

kgmeters

Question number: 82

» Oscillations and Waves » Simple Harmonic Motion » Phase

MCQ▾

Question

The path difference between the two waves y1=a1sin(ωt2πxλ) and y2=a2sin(ωt2πxλ+ϕ) is

Choices

Choice (4) Response

a.

λ2π(ϕ+π2)

b.

2πλϕ

c.

λ2πϕ

d.

2πλ(ϕπ2)

Question number: 83

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.130 second. The frequency of the wave is,

Choices

Choice (4) Response

a.

2.47 Hz

b.

1.785 Hz

c.

1.73 Hz

d.

1.92 Hz

Question number: 84

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

The minimum, possible time period (Takeg=π2)

Choices

Choice (4) Response

a.

0.3 sec.

b.

0.4 sec.

c.

0.2 sec.

d.

0.1 sec

Question number: 85

» Oscillations and Waves » Simple Pendulum

Assertion-Reason▾

Assertion (Ꭺ)

given 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.

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

b.

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

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

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