# KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 147 - 150 of 268

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## Question number: 147

Appeared in Year: 2015

MCQ▾

### Question

A wire bent in the shape of a regular n polygonal loop carries a steady current I. Let I be the perpendicular distance of a given segment and R be the distance of given segment and R be the distance of a vertex both from the centre of the loop. The magnitude of the magnetic field at the centre of the loop is given by.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 148

MCQ▾

### Question

The breaking strength of thread of a simple pendulum, whose bob has mass m, is 2 mg. What is the maximum angular amplitude that can be given to the pendulum?

### Choices

Choice (4) Response

a.

520

b.

600

c.

480

d.

400

## Question number: 149

MCQ▾

### Question

A 1.5 kg object travelling with uniform acceleration covers 16 m in 4th second and 20 m in 5th second. Which of the following is correct?

### Choices

Choice (4) Response

a.

The force on the object is 6N.

b.

The initial velocity of the object is 2 ms-1

c.

The acceleration of the object is 4 ms-2.

d.

All a. , b. and c. are correct

## Question number: 150

MCQ▾

### Question

The breaking strength of thread of a simple pendulum, whose bob has mass m, is 4 mg. What is the maximum angular amplitude that can be given to the pendulum?

### Choices

Choice (4) Response

a.

450

b.

600

c.

700

d.

300

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