NEET Physics: Questions 974 - 978 of 2142

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Question number: 974

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

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.

Very near the eye.

c.

25 cm from 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: 975 (1 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: 976 (2 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: 977 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

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 remain the same regardless of any changes to f.

b.

There is not enough information to answer the question.

c.

(∆V L) will increase.

d.

(∆V L) will decrease.

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.

Equation

b.

Equation

c.

Equation

d.

Equation

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