Question # 1

_____________ easily undo bolt?

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Long spanner

Medium

Short spanner

Every spanner

In screw gauge if zero of circular scale is behind the index line is called error.

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Positive

Zero

Negative

None of these

A sugar bag of 1 kg has a momentum 25 kg m/s than its velocity is :

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v = 20 m/s

v = 25 kg

V = 25 m/s

v = 25 kg/ms-1

Moon is our satellite:

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Artificial

Permanent

Natural

Communication

The S.I unit of work is :

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J

N

Kg

m

The product of mass and velocity is called ................. .

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Momentum

Force

Acceleration `

Nil

A refrigerator is based on the principles of .

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Mechanics

Electricity

Thermodynamics

Electronics

The smallest division taht can be taken by a meter rule is.

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1 cm

1 mm

1 dm

1 km

After tilting if body come back to its original position then the body is in:

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Stable equilibrium

unstable equilibrium

Neutral equilibrium

Equilibrium

Sliding friction can be changed into rolling friction by using:

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Ball bearing

Roller bearing

Both a and b

None of these

S.I unit of gravitational field strength is:

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Nkg

Nkg^-1

Nkg^-2

Nkg^-3

Heat radiation obey the laws of:

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Absorption

Reflection

Both A and B

None

The process in which heat is transmitted form one body to another by the interaction of atoms and the movement of free electrons is known as

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convection

radiation

conduction

both (a) and (b)

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