NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1074 - 1077 of 2184

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Question number: 1074

» Electromagnetic Waves » Applications of Electromagnetic Waves

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MCQ▾

Question

Which of the following statements are true?

(1) Photographic plates are sensitive to ultraviolet rays.

(2) Photographic plates can be made sensitive to infrared rays.

(3) Infrared rays are emitted by hot objects.

(4) Infrared photon has more energy than the photon of visible light.

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

Codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 2 are correct

Question number: 1075

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

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MCQ▾

Question

In a series LCR circuit, resistance R = 10 Ω and the impedance Z = 20 Ω. The phase difference between the current and the voltage is,

Choices

Choice (4) Response

a.

90°

b.

45°

c.

60°

d.

30°

Question number: 1076

» Ray Optics » Magnification

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MCQ▾

Question

A lens is placed between a source of light and a wall. It forms images of area A 1 and A 2 on the wall for its two different positions. The area of the source of light is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1077

» Electromagnetic Induction & Alternating Currents » Resonance

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MCQ▾

Question

A 10 ohm resistance, 5 mH inductance coil and 10 µF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency

Choices

Choice (4) Response

a.

is halved

b.

is quadrupled

c.

remains unchanged

d.

is doubled