Question # 1

If a convex lens is used as a magnifying glass, whcih lens will give higher magnification that has.

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Short size

Long focal length

Large size

Short focal length

Viscosity is represented by Greek letter

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The wavelength of wave produced by microwave oven is.

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12 cm

12 m

18 m

18 cm

Image formed by a concave lens is

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Real

Virtual

Erect

None of these

the acceleration of a body having SHM, depends upon its.

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Time period

Amplitude

Frequency

Displacement from mean position

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

Weight of a 60 kg man in moving elevator with constant acceleration of 1/2 f

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Zero

300 N

600 N

200 N

A phenomenon by which energy is dissipated from the oscillating system is called.

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Forced oscillation

Free oscillation

Damping

Simple harmonic motion

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

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 fluid is said to be incompressible, if its density is.

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Zero

Very high

Constant

Very small

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

Close orbiting satellites orbit the earth at a height of about

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400 km

4000 km

400 m

400 cm

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

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