NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 977 - 981 of 2320

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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 (2 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

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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.

7.8 V

b.

10.0 V

c.

7.4 V

d.

4.8 V

Question number: 978 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

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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.

10.0 V

b.

4.0 V

c.

13.6 V

d.

18.8 V

Question number: 979

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

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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: 980

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

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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.

7.2 cm

c.

12.4 cm.

d.

2.8cm.

Question number: 981

» Electromagnetic Induction & Alternating Currents » Alternating Currents

Edit
Assertion-Reason▾

Question

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.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

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