# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1659 - 1661 of 2247

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## Question number: 1659

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MCQ▾

### Question

The length of a second’s pendulum is 7 m. The spherical bob which is empty from inside has a mass of 150 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be

### Choices

Choice (4) Response

a.

4 sec

b.

5.30 sec

c.

4.43 sec

d.

2.38 sec

## Question number: 1660

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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 2 are correct

b.

1 and 3 are correct

c.

2 and 4 are correct

d.

1,2 and 3 are correct

## Question number: 1661

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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.

b.

c.

d.

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