NEET Physics: Questions 977 - 981 of 2098

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Passage

Read the passage given below and answer the questions that follow:

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

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

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

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

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.

30

b.

3×104

c.

3×102

d.

3×104

Question number: 979

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

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

» 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: 981

» Electromagnetic Waves » Applications of Electromagnetic Waves

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.

λm>λν>λx

b.

λν>λx>λm

c.

λν>λm>λx

d.

λm>λx>λν

Sign In