Electromagnetic Waves (BITSAT Physics): Questions 1 - 5 of 5

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Question number: 1

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Lightning was discovered by –

Choices

Choice (4) Response

a.

Ohm

b.

Franklin

c.

Thomson

d.

Faraday

Question number: 2

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

If luminous-efficiency of a lamp is 2lumenwatt and its luminous-intensity is 42 candela then, power of the lamp is –

Choices

Choice (4) Response

a.

138W

b.

62W

c.

76W

d.

264W

Question number: 3

» Electromagnetic Waves » Electromagnetic Spectrum » Visible

MCQ▾

Question

Which of the following series is found in the visible region?

Choices

Choice (4) Response

a.

Balmer

b.

Paschen

c.

Pfund

d.

Lyman

Question number: 4

» Electromagnetic Waves » Electromagnetic Spectrum » Visible

MCQ▾

Question

In red light and violet light rays are of focal lengths fRandfv . Then which one of the following is true?

Choices

Choice (4) Response

a.

μR>μv

b.

λRλV

c.

μR<μv

d.

λR=λV

Question number: 5

» Electromagnetic Waves » Electromagnetic Spectrum » Infrared

MCQ▾

Question

Which of the following statement is not correct?

Choices

Choice (4) Response

a.

Infra-red photons have more energy than photons of visible light

b.

Photographic plates are sensitive to ultraviolet rays

c.

Infra-red rays are invisible but can cast shadows like visible light

d.

Photographic plates are sensitive to infra-red rays

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