NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 987 - 991 of 2320

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Question number: 987

» Electromagnetic Waves » Applications of Electromagnetic Waves

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MCQ▾

Question

Which of the following pairs of space and time varying E and B fields would generate a plane electromagnetic wave travelling in (-Z) direction?

Choices

Choice (4)Response

a.

E Z, B Y

b.

E Y, B X

c.

E X, B Y

d.

E X, B Z

Question number: 988

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

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MCQ▾

Question

Two mirrors are inclined at an angle of 50°. Then what is the number of images formed for an object placed in between the mirrors?

Choices

Choice (4)Response

a.

6

b.

1

c.

3

d.

7

Question number: 989

» Ray Optics » Snell's Law

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MCQ▾

Question

A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II, III and IV are respectively. The angle of incidence θ for which the beam just misses entering Region IV is,

Beam Travelling from Region I to Region IV

Beam Travelling from Region I to Region IV

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 990

» Ray Optics » Mirror Formula

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MCQ▾

Question

convex mirror is used to form the image of an object. Which of the following statements is wrong?

Choices

Choice (4)Response

a.

The image is erect

b.

The image is diminished in size

c.

The image is real

d.

The image lies between the pole and the focus

Question number: 991

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

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MCQ▾

Question

Light wave is travelling along + y-direction. If the corresponding E vector at that time is along + x-direction, B vector must be directed along.

Choices

Choice (4)Response

a.

+ Z axis

b.

- Z axis

c.

X-axis

d.

Y-axis

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