Electromagnetic Induction & Alternating Currents (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 106 - 109 of 124

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Question number: 106

» 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: 107

» 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

Question number: 108

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

In a series LCR circuit, resistance R = 10 Ω and the impedance Z = 20 Ω. The phase difference between the current and the voltage is,

Choices

Choice (4) Response

a.

45°

b.

30°

c.

60°

d.

90°

Question number: 109

» Electromagnetic Induction & Alternating Currents » Resonance

MCQ▾

Question

A 10 ohm resistance, 5 mH inductance coil and 10 µF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency

Choices

Choice (4) Response

a.

is doubled

b.

is halved

c.

is quadrupled

d.

remains unchanged

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