Question # 1

Metals are good conductor of heat dut to the:

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Free electron

Big size of their molecule

Small size of their molecules

Rapid vibrations of their atoms

What will be the magnitude of work if a force of 25N pulls a stone through a distance of 5 m in its directions

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25 J

50 J

75 J

125 J

A force of 10 N is making and angle of 30^owith the horizontal. Its horizontal component will bw:

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4 N

5 N

7 N

8.7 N

The S.I unit of efficiency is :

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J/s

Nm

watt

It has no unit

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

The value of g on moon's surface is 1.6 ms^-2. what will be the weight of a 100 kg body on the surface of the moon?

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100 N

160 N

1000 N

1600 N

Plasma is in ___________ form.

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Moleculer

Kinetic

Static

Ionized

The value of sin θ at an angle of 60o is

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0.5

0

0.707

0.866

Mass of earth is Me is :

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Me = 6× 1024 kg

6× 1024 kg

7× 1024 kg

6× 1024 Mg

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

Dogs sweat through:

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Tongue

Legs

Skin

Glands

Cos 0^ois

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0

2

1

0.5

SI unit of work is:

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Joule

Coulomb

Ampere

Kelvin

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