# NEET Physics: Questions 977 - 981 of 2142

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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: 977 (3 of 3 Based on Passage) Show Passage

MCQ▾

### Question

What result should the student expect for a measurement of the amplitude E m of the potential difference across the power supply?

### Choices

Choice (4) Response

a.

18.8 V

b.

13.6 V

c.

4.0 V

d.

10.0 V

## Question number: 978

MCQ▾

### Question

A point source of 2 watt is radiating uniformly in all direction in vacuum. Find the amplitude of electric field at a distance 2m from it-

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 979

MCQ▾

### Question

A Galilean telescope consists of an objective of focal length 12 cm and eye-piece of focal length 4 cm. What should be the separation of the two lenses when the virtual image of a distant object is formed at a distance of 24 cm from the eye-piece?

### Choices

Choice (4) Response

a.

8.2 cm.

b.

12.4 cm.

c.

7.2 cm

d.

2.8cm.

## Question number: 980

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: 981

MCQ▾

### Question

If λ ν, λ x and λ m represent the wavelength of visible light, x-rays, and microwaves respectively, then

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page