Physics
We feel cool when we sit near the fan, this is because

Fan cools surrounding air.
Air vapourises the sweat on our body.
We feel cool when air touches the body.
Fan gives cool air.

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Physics
Which one of the following is not a property of electromagnetic waves?

Electromagnetic waves are transverse waves
Oscillating electric field and magnetic field are perpendicular to each other.
Electromagnetic waves do not require a medium to propagate.
Electromagnetic waves do not show interference and diffraction.

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Physics
Pressure Cooker cooks faster because

Boiling point decreases with rise of pressure
The material of the cooker is a good conductor
It cooks the food at low pressure
Higher temperature is attained for cooking

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