Question # 1

The commercial unit of electric energy is

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Kilo watt hour

watt

Watt hour

Kilo Watt

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

If the are of a circle equals its radius, then the angle subtended at the center will be

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1 degree

One rotation

One radian

Half rotation

The term in Bernoulli's equation has the same unit as

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Work

Volume

Pressure

Force

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

The motion and rest are

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Absolute

Relative

Mutual

All of these

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

When body acquires terminal velocity them its acceleration 'a' becomes.

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a = 0

a = g

a > 0

a < 0

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

Experimentation and practical verification was fist indroduced by

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The Muslim Scientists

The Greek philosopher

The European scientsts

None of these

Which one of the following force cannot do any work on the particle on which it acts.

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Fractional force

Gravitational force

Electrostatic force

Centripetal force

The concentration of red blood cells in the blood is nearly.

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40%

60%

25%

50%

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

The to and fro motion of a body is called

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Linear motion

Rotational motion

Vibratory motion

None of these

the final image obtained by astronomical telescope is.

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Erect

Virtual

Magnified

All of these

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

The work done is isochoric process is.

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Constant

Variable

Zero

Depend upon condition

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