# Electromagnetic Induction & Alternating Currents-AC Generator and Transformer (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 10 - 14 of 14

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## Question number: 10

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

### Question

A transformer has turn ratio 100: 1. If secondary coil has 4 amp current then current in primary coil is

### Choices

Choice (4) Response

a.

4 A

b.

0.04 A

c.

400 A

d.

0.4 A

## Question number: 11

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

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.

300 V

c.

150 V

d.

75 V

## Question number: 12

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

### Question

Voltage (r. m. s) in the secondary coil of a transformer depends upon

(1) Voltage in the primary coil

(2) Ratio of number of turns in the two coils

(3) Frequency of the source

(4) Time-period of the source

Select the correct answers and mark it according to the following

### Choices

Choice (4) Response

a.

1 and 2 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1,2 and 3 are correct

## Question number: 13

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

### Question

A current of 5A is flowing at 220 V in the primary coil of a transformer. If the voltage produced in the secondary coil is 2200V and 50 % of power is lost, then the current in the secondary coil will be -

### Choices

Choice (4) Response

a.

0.25A

b.

0.025A

c.

5A

d.

2.5A

## Question number: 14

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Appeared in Year: 2017

MCQ▾

### Question

In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is . If current gain is and the base resistance is , the voltage and power gain of the amplifier is:

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page