Question # 1

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

The components of a vector which are perpendicular to each other are called

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Horizontal components

Vertical components

Rectangular components

All of these

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

The magnifying power is also called

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Resolving power

Angular magnification

Strength of eye

None of these

The resultant of two forces 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

73.650 rounded off upto one decimal is

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73.6

74.00

73.7

73.65

Identity the non conservative force among the following.

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Frictional force

Electrical force

Gravitational force

Elastic restoring force

Time taken by light to reach from sun to earth is.

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8 min 20 sec

7 min 20 sec

9 min 20 sec

None of these

the wavelength of transverse wave travelling with a speed 'v' having frequency 'f' in equal to

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f/v

Vf

V/f

f/V2

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

Speed of sound in aluminum at 20 ^oC is.

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3600 m/s

5100 m/s

5130 m/s

3500 m/s

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

Which one of the followign Muslim mathmatision determined the earths circumference.

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Al Beruni

Ibn Sina

Al Khawrizmi

None of these

The types of optical fibres are

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Three

Four

Five

Six

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

Bunsen burner works on the principle of.

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Venturi effect

Terricilli's effect

Bernoulli's effect

None of these

Close orbiting satellites orbit the earth at a height of about

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400 km

4000 km

400 m

400 cm

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