Electromagnetic Induction & Alternating Currents-AC Generator and Transformer (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 14

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Question number: 1

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Edit
Assertion-Reason▾

Question

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 true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

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

Edit
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 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: 3

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Edit
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.

100 V

b.

60 V

c.

180 V

d.

20 V

Question number: 4

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Edit
MCQ▾

Question

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

Choices

Choice (4)Response

a.

Generator

b.

Galvanometer

c.

Voltmeter

d.

Electric motor

Question number: 5

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

A transformer cannot work on dc supply.

Reason (Ꭱ)

dc changes neither in magnitude nor in direction.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are 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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