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Physics

Physics
Nuclear sizes are expressed in a unit named

Fermi
Tesla
Angstrom
Newton

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Physics
X–rays are

None of these
Neutral particles
Negatively charged particles
Positively charged particles

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Physics
A small gap is left at the joints of rails in a railway track to

Avoid the tracks being distorted due to seasonal temperature variation
Control the speed of train
Keep the rails equidistant
Avoid the heating of tracks to high temperature

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Physics
Vehicle tyres are inflated properly

To avoid skidding and to minimise friction
To allow the vehicle to take more load.
To go fast and save fuel.
To ensure smooth running.

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Physics
The temperature at which water boils depends mainly on

Specific heat
Relative humidity
Density
Air Pressure

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Physics
In a diesel engine the high temperature needed to ignite the fuel is achieved by

Compressing air in the cylinders
Using heat from exhaust
The battery
An electrical spark

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MORE MCQ ON Physics

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