NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1760 - 1763 of 2184

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Question number: 1760

» Oscillations and Waves » Simple Pendulum

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MCQ▾

Question

A simple pendulum is executing simple harmonic motion with a time period . If the length of the pendulum is increased by 21%, the percentage increase in the time period of the pendulum of is,

Choices

Choice (4) Response

a.

21%

b.

30%

c.

50%

d.

10%

Question number: 1761

» Oscillations and Waves » Simple Pendulum

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MCQ▾

Question

Identify wrong statements among the following,

(1) The greater the mass of a pendulum bob, the shorter is its frequency of oscillation

(2) A simple pendulum with a bob of mass m swings with an angular amplitude of 40°. When its angular amplitude is 20°, the tension in the string is less than mg cos 20 0.

(3) As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also increase.

(4) The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1,2 and 3 are correct

Question number: 1762

» Oscillations and Waves » Wave Motion

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MCQ▾

Question

A tuning fork makes 125 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.

2.64 m

b.

2.56 m

c.

1.89 m

d.

2.29 m

Question number: 1763

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

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MCQ▾

Question

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the short piece will have a force constant of

Choices

Choice (4) Response

a.

b.

c.

d.