Electromagnetic Induction & Alternating Currents-Peak and RMS Value of AC (NEET Physics): Questions 5 - 11 of 13

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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 2 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

RMS value of the voltage is

Choices

Choice (4) Response

a.

2002V

b.

314 V

c.

2202V

d.

220 V

Question number: 6 (2 of 2 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

Average voltage is

Choices

Choice (4) Response

a.

2002V

b.

2202V

c.

622πV

d.

220 V

Question number: 7

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

If instantaneous current is given by i=4cos(ωt+ϕ) amperes, then the r. m. s value of current is

Choices

Choice (4) Response

a.

4 ampere

b.

22ampere

c.

zero ampere

d.

42ampere

Question number: 8

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

A resistance of 20Ω is connected to a source of an alternating potential V = 220 sin (100πt). The time taken by the current to change from its peak value to r. m. s value is,

Choices

Choice (4) Response

a.

0.25 sec

b.

0.2 sec

c.

2.5 x 10 -3 sec

d.

25 x 10 -3 sec

Question number: 9

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

In a circuit, the value of alternating current is measured by hot wire ammeter as 10 ampere. Its peak value will be

Choices

Choice (4) Response

a.

20 A

b.

14.14 A

c.

7.07 A

d.

10 A

Question number: 10

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

The peak value of an alternating e. m. f. E given by E = E 0 cos t is 10 volts and its frequency is 50 Hz. At time t=1600sec , the instantaneous e. m. f. is

Choices

Choice (4) Response

a.

1 V

b.

10 V

c.

5 V

d.

53V

Question number: 11

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

An alternating current is given by the equation i=i1cosωt+i2sinωt . The r. m. s. current is given by

Choices

Choice (4) Response

a.

12(i1+i2)

b.

12(i1+i2)2

c.

12(i12+i22)12

d.

12(i12+i22)12

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