# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 725 - 729 of 2184

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## Question number: 725

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MCQ▾

### Question

A rectangular coil of size 10 cm x 20 cm has 60 turns. It is rotating about one of its diagonals in magnetic field 0.5 Wb/m 2 with a rate of 1800 revolution per minute. The induced e. m. f. in the coil can be,

(1) 111 V (2) 112 V

(3) 113 V (4) 114 V

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

### Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

## Question number: 726

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MCQ▾

### Question

An alternating voltage is connected to a 1 µF capacitor through an ac ammeter. The reading of the ammeter will be

### Choices

Choice (4) Response

a.

10 mA

b.

20 mA

c.

80 mA

d.

40 mA

## Question number: 727

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MCQ▾

### Question

Three identical metal balls each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed, when centers of three balls are joined. The center of the mass of system is located at

### Choices

Choice (4) Response

a.

Centre of one of the balls

b.

Point of intersection of the medians

c.

Line joining centers of any two balls

d.

Horizontal surface

## Question number: 728

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MCQ▾

### Question

The frequency of an alternating voltage is 50 cycles/sec and its amplitude is 120 V. Then the r. m. s value of voltage is

### Choices

Choice (4) Response

a.

84.8V

b.

101.3V

c.

56.5V

d.

70.7V

## Question number: 729

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MCQ▾

### Question

Four particles of masses m, 2m, 3m and 4m are arranged at the corners of a parallelogram with each side equal to a and one of the angle between two adjacent sides is 60°. The parallelogram lies in the x-y plane with mass-m at the origin and 4m on the x-axis. The center of mass of the arrangement will be located at

### Choices

Choice (4) Response

a.

b.

c.

d.