NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1055 - 1058 of 2184

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Question number: 1055

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

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MCQ▾

Question

A light beam travelling in the X-direction is described by the electric field

. An electron is constrained to move along the Y-direction with a speed of 2.0 x 10 7 m/s. Find the maximum magnetic force (in N) on the electron.

Choices

Choice (4) Response

a.

3.2 x 10 -18

b.

7.8 x 10 -12

c.

6.5 x 10 -11

d.

5.1 x 10 -16

Question number: 1056

» Ray Optics » Deviation and Dispersion of Light by a Prism

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MCQ▾

Question

The refractive index of the material of a prism is and its prism angle is 30°. One of its refracting faces is polished. The incident beam of light will return back for the angle of incidence

Choices

Choice (4) Response

a.

45°

b.

c.

30°

d.

60°

Question number: 1057

» Ray Optics » Deviation and Dispersion of Light by a Prism

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MCQ▾

Question

The wrong statements are

(1) The order of colors in the primary and the secondary rainbows is the same

(2) The intensity of colors in the primary and the secondary rainbows is the same

(3) The intensity of light in the primary rainbow is greater and the order of colors is the same than the secondary

(4) The intensity of light for different colors in primary rainbow is greater and the order of colors is reverse as that in the secondary rainbow

elect the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Question number: 1058

» Ray Optics » Mirror Formula

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MCQ▾

Question

There is a convex mirror of radius 50 cm. The image of a point at a distance 50 cm from the pole of mirror on its axis will be formed at:

Convex mirror of radius 50 cm

Convex Mirror of Radius 50 Cm

In figure there is a convex mirror of radius 50 cm. the object distance is 50 cm from the mirror.

Choices

Choice (4) Response

a.

Focus

b.

Pole

c.

Infinity

d.

16.67 cm behind the mirror