Electromagnetic Induction & Alternating Currents-LCR Series Circuit (NEET Physics): Questions 9 - 11 of 17

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Question number: 9

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

An ac source is connected to a resistive circuits. Which of the following statements are false?

(1) Current leads-the voltage

(2) Current lags behind the voltage

(3) Any of (1) or (2) may be true depending upon the value of resistance

(4) Current and voltage are in same phase

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

1 and 2 are correct

Question number: 10

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

An alternating current source of frequency 100 Hz is joined to a combination of a resistance, a capacitance and a inductance in series. The potential difference across the inductance, the resistance and the capacitor is 46, 8 and 40 volt respectively. The electromotive force of alternating current source in volt is

Choices

Choice (4) Response

a.

94

b.

14

c.

76

d.

10

Question number: 11

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Assertion-Reason▾

Assertion (Ꭺ)

When capacitive reactance is smaller than the inductive reactance in LCR current, e. m. f. leads the current.

Reason (Ꭱ)

The phase angle is the angle between the alternating e. m. f. and alternating current of the circuit.

Choices

Choice (4) Response

a.

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

b.

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

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

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