Electromagnetic Induction & Alternating Currents-Alternating Currents (NEET Physics): Questions 5 - 9 of 9

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Passage

Read the passage given below and answer the questions that follow:

If the voltage in an a c circuit is represented by the eq. , V=2202sin(314tΦ) , then

Question number: 5 (1 of 1 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Alternating Currents

MCQ▾

Question

Frequency of ac is

Choices

Choice (4) Response

a.

502Hz

b.

50 Hz

c.

75 Hz

d.

503Hz

Question number: 6

» Electromagnetic Induction & Alternating Currents » Alternating Currents

Assertion-Reason▾

Assertion (Ꭺ)

An alternating current does not show any magnetic effect.

Reason (Ꭱ)

Alternating current varies with time.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

Question number: 7

» Electromagnetic Induction & Alternating Currents » Alternating Currents

MCQ▾

Question

In an ac circuit I=100sin200πt . The time required for the current to achieve its peak value will be

Choices

Choice (4) Response

a.

1100sec

b.

1300sec

c.

1200sec

d.

1400sec

Question number: 8

» Electromagnetic Induction & Alternating Currents » Alternating Currents

Assertion-Reason▾

Assertion (Ꭺ)

A sinusoidal alternating current does not show any magnetic effects.

Reason (Ꭱ)

The average value of alternating current is zero.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

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: 9

» Electromagnetic Induction & Alternating Currents » Alternating Currents

Assertion-Reason▾

Assertion (Ꭺ)

An alternating current is more dangerous than the direct steady current.

Reason (Ꭱ)

The frequency of the alternating current is injurious the human body.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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