Electromagnetic Induction & Alternating Currents-AC Generator and Transformer (NEET Physics): Questions 10 - 13 of 13

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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

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