Oscillations and Waves-Simple Pendulum (NEET Physics): Questions 11 - 13 of 28

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Question number: 11

» 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.

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: 12

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The bob of a simple pendulum is displaced from its equilibrium position O to a position Q which is at height h above O and the bob is then released. Assuming the mass of the bob to be m and time period of oscillations to be 2.0 sec, the tension in the string when the bob passes through O is,

Choices

Choice (4) Response

a.

m(g+π23gh)

b.

m(g+π2gh)

c.

m(g+π22gh)

d.

m(g+π2gh)

Question number: 13

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The bob of a pendulum of length l is pulled aside from its equilibrium position through an angle θ and then released. The bob will then pass through its equilibrium position with a speed v, where v equals

Choices

Choice (4) Response

a.

2gl(1+cosθ)

b.

2gl(1+sinθ)

c.

2gl(1sinθ)

d.

2gl(1cosθ)

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