# Electromagnetic Induction & Alternating Currents (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 89 - 92 of 124

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## Passage

A student constructs a series RLC circuit. While operating the circuit at a frequency f she uses an AC voltmeter and measures the potential difference across each device as (∆V R) = 8.8 V, (∆V L) = 2.6V and (∆V C) = 7.4V.

## Question number: 89 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

### Question

The circuit is constructed so that the inductor is next to the capacitor. What result should the student expect for a measurement of the combined potential difference (∆V L + ∆V C) across the inductor and capacitor?

### Choices

Choice (4) Response

a.

10.0 V

b.

4.8 V

c.

7.4 V

d.

7.8 V

## Question number: 90

» 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: 91

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

### Question

A series LCR arrangement with X L =80Ω, X C = 50Ω, R = 40Ω is applied across a. c. source of 200 V. Choose the correct options.

(1) Wattless current = 3.2 A

(2) Power current = 3.2 A

(3) Power factor = 0.6

(4) Impedance of circuit = 50 Ω

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

Codes:

### Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 2 are correct

## Question number: 92

» Electromagnetic Induction & Alternating Currents » Resonance

MCQ▾

### Question

The coefficient of induction of a choke coil is 0.1 H and resistance is 12Ω. If it is connected to an alternating current source of frequency 60 Hz, then power factor is approximately

### Choices

Choice (4) Response

a.

0.1

b.

0.30

c.

0.2

d.

0.4

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