Electromagnetic Induction & Alternating Currents-AC Generator and Transformer (NEET Physics): Questions 1 - 5 of 13

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Question number: 1

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Assertion-Reason▾

Assertion (Ꭺ)

Soft iron is used as a core of transformer.

Reason (Ꭱ)

Area of hysteresis loop for soft iron is small.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are false
b. Ꭺ is true but Ꭱ is false
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 2

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

Core of a transformer can’t be made up of

(1) Steel (2) Alnico

(3) Iron (4) Soft iron

Select the correct answers and mark it according to the following

Choices

Choice (4) Response
a.

1, 2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 3

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

A step up transformer has transformation ratio 5: 3. What is voltage in secondary if voltage in primary is 60 V.

Choices

Choice (4) Response
a.

180 V

b.

20 V

c.

100 V

d.

60 V

Question number: 4

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

Which of the following is constructed on the principle of electromagnetic induction?

Choices

Choice (4) Response
a.

Galvanometer

b.

Generator

c.

Electric motor

d.

Voltmeter

Question number: 5

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Assertion-Reason▾

Assertion (Ꭺ)

A transformer cannot work on dc supply.

Reason (Ꭱ)

dc changes neither in magnitude nor in direction.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Ꭺ is false but Ꭱ is true
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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