Oscillations and Waves-Free Forced and Damped Oscillations (NEET Physics): Questions 1 - 3 of 3

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Question number: 1

» Oscillations and Waves » Free Forced and Damped Oscillations

MCQ▾

Question

A simple pendulum of length L and mass (bob) M is oscillating in a plane about a vertical line between angular limits – ϕ and + ϕ. For an angular displacement θ (| θ| < ϕ), the tension in the string and the velocity of the bob are T and v respectively. The following relations hold good under the above conditions.

(1) TMgcosθ=Mv2L

(2) Tcosθ=Mg

(3) The magnitude of the tangential acceleration of the bob aT =gsinθ

(4) T=Mgcosθ

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

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

Question number: 2

» Oscillations and Waves » Free Forced and Damped Oscillations

MCQ▾

Question

A simple pendulum of length L and mass (bob) M is oscillating in a plane about a vertical line between angular limits – ϕ and + ϕ. For an angular displacement θ (| θ| < ϕ), the tension in the string and the velocity of the bob are T and v respectively. The following relations hold good under the above conditions.

(1) TMgcosθ=Mv2L

(2) Tcosθ=Mg

(3) The magnitude of the tangential acceleration of the bob aT =gsinθ

(4) T=Mgcosθ

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

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1, 2 and 3 are correct

Question number: 3

» Oscillations and Waves » Free Forced and Damped Oscillations

Assertion-Reason▾

Assertion (Ꭺ)

Damping decreases the time period of oscillation of a simple pendulum.

Reason (Ꭱ)

Damped oscillation implies loss of energy.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

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

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