# 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.