Question # 1

No spark plug is needed in the

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Petrol engine

Diesel engine

Gas engine

Water engine

For 2.450 no. of significant digits.

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2

1

3

4

Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

When average velocity becomes equal to instantaneous than body is called moving with.

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Instantaneous acceleration

Constant acceleration

Constant velocity

Variable velocity

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

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Work

Volume

Pressure

Force

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 motion and rest are

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Absolute

Relative

Mutual

All of these

Angular acceleration is produced by

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Power

Torque

Pressure

Force

Number of seconds in a day is

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9000 sec

3600 sec

86400 sec

43200 sec

The resultant of two vectors having magnitude 12 N and 8 N can not be

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2 N

20 N

10 N

16 N

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

__ will travel faster than other through an optical fibre.

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Ultraviolet light

Visible light

Infrared light

White light

A wheel of radius 50 cm having an angular speed of a rad /s have linear speed.

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1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

Dot product of vector with itself is.

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Zero

2 A

A²

A

A body rotating with angular velocity of 2 radian/s and linear velocity is also 2 ms-1, then radius of circle is.

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1 m

0.5 m

4 m

2 m

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

According to Newton's formula, the speed of sound in air at STP is

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332 ,ms-1

340 ms-1

350 ms-1

280 ms-1

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