Question # 1

A spring has a spring constant k. If it is cut in two equal parts, the spring constant of each part will be

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K

2 K

K/2

4K

When speed of a body is doubled then its

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K.E. is doubled

P.E. is doubled

Acceleration of doubled

Momentum is doubled

When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

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In case the work done in zero.

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Constant pressure

Constant volume

Constant temperature

Constant mass

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

Pascal is the unit of

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Pressure

Force

Tension

Weight

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

The regular or steady flow of fluid is called

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Stream line

Turbulent flow

Average flow

None of these

The Science of physics based on

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Fundamental Quantities

Hyppthesis

Experimetns and measurement

Only definitaon

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

When a vector is multiplied by a (-)ve number its direction

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Remains constant

Reversed

Change by 90°

None of these

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

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

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