AIIMS (All India Institute of Medical Sciences) Physics: Questions 189 - 193 of 500

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Question number: 189

» Wave Optics » Interference

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Appeared in Year: 2000

MCQ▾

Question

The ratio of intensities of two waves is 9: 1. When they superimpose, the ratio of maximum to minimum intensity will become –

Choices

Choice (4)Response

a.

4: 1

b.

3: 1

c.

1: 1

d.

2: 1

Question number: 190

» Thermodynamics » Carnot Engine and Its Efficiency

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Appeared in Year: 2001

MCQ▾

Question

If the system takes 100 Cal. heat, and releases 80 cal. to sink, if source temperature is 127°C find the sink temp –

Choices

Choice (4)Response

a.

107°C

b.

47°C

c.

67°C

d.

127°C

Question number: 191

» Properties of Solids & Liquids » Heat Transfer » Conduction

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Appeared in Year: 1998

MCQ▾

Question

On a cold morning, a metal surface will feel colder to touch than a wooden surface because –

Choices

Choice (4)Response

a.

Metal has low thermal conductivity

b.

Metal has high thermal conductivity

c.

Metal has high specific heat

d.

Metal has low specific heat

Question number: 192

» Communication System » Propagation of Electromagnetic Waves in the Atmosphere

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Appeared in Year: 2003

MCQ▾

Question

The maximum distance up to which TV transmission from a TV tower of height h can be received is proportional to –

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 193

» Communication System » Sky and Space Wave Propagation

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Appeared in Year: 2003

MCQ▾

Question

In short wave communication waves of which of the following frequencies will be reflected back by the ionosphere layer having electron density 1011 per m3?

Choices

Choice (4)Response

a.

10 MHz

b.

18 MHz

c.

2 MHz

d.

12 MHz

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