NEET Physics: Questions 1759 - 1762 of 2098

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Question number: 1759

» Oscillations and Waves » Simple Pendulum

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.

10%

b.

21%

c.

30%

d.

50%

Question number: 1760

» Oscillations and Waves » Simple Pendulum

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.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

Question number: 1761

» Oscillations and Waves » Wave Motion

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.

2.56 m

b.

2.29 m

c.

1.89 m

d.

2.64 m

Question number: 1762

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

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.

(23)k

b.

6k

c.

(32)k

d.

3k

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