# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 790 - 793 of 2247

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## Question number: 790

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MCQ▾

### Question

An inductor (L = 100 mH), a resistor (R = 100Ω) and a battery (E = 100 V) are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit 1 ms after the short circuit is

### Choices

Choice (4) Response

a.

0.1 A

b.

c.

e A

d.

1 A

## Question number: 791

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MCQ▾

### Question

A small coil of N 1 turns, l 1 length is tightly wound over the center of a long solenoid of length l 2 , area of cross-section A and number of turns N 2. If a current I flows in the small coil, then the flux through the long solenoid is,

### Choices

Choice (4) Response

a.

b.

c.

zero

d.

## Question number: 792

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MCQ▾

### Question

A 50 Hz a. c. current of crest value 1A flows through the primary of a transformer. If the mutual inductance between the primary and secondary be 1.5 H, the crest voltage induced in secondary is-

### Choices

Choice (4) Response

a.

471 V

b.

75 V

c.

300 V

d.

150 V

## Question number: 793

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MCQ▾

### Question

The angular disc of copper, with inner radius a and outer radius b is rotating with a uniform angular speed ω, in a region where a uniform magnetic field B along the axis of rotation exists. Then, the emf induced between inner side and the outer rim of the disc is-

### Choices

Choice (4) Response

a.

b.

c.

Zero

d.

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