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Physics

Physics
What type of simple machine is an axe?

Wedge
The screw
Lever
Both A & B

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Physics
The best conductor of electricity among the following is :

Silver
Iron
Copper
Aluminium

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Physics
Electrical burns occur principally because of

Radiation pulses of the electricity
The high energy of electrons
All of these
The heat generated by the flow of electrical current through the body

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Physics
Water from soil enters into the root hairs owing to :

Root pressure
Atmospheric pressure
Capillary pressure
Osmotic pressure

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Physics
Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be

3P
P
P/3
2p/ 3

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Physics
Mist is caused by

Water vapour at low temperature
Carbon-monoxide in solid form
Dry ice
Ice at low temperature

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MORE MCQ ON Physics

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