NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 975 - 979 of 2184

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Question number: 975

» Ray Optics » Lens Maker's Formula and Lens Formula

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MCQ▾

Question

The focal length of the lens of the human eye is maximum when it is looking at an object at,

Choices

Choice (4) Response

a.

Infinity

b.

25 cm from the eye

c.

Very near the eye.

d.

100 cm from the eye

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: 976 (1 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

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MCQ▾

Question

What will happen to the value of ( ∆V L ) if the frequency is adjusted to increase the current through the circuit?

Choices

Choice (4) Response

a.

(∆V L) will decrease.

b.

(∆V L) will increase.

c.

(∆V L) will remain the same regardless of any changes to f.

d.

There is not enough information to answer the question.

Question number: 977 (2 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: 978 (3 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: 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.