Physics
The type of mirrors used in the headlamp of cars is

Cylindrical concave
Parabolic concave
Spherical convex
Plane

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Physics
Pressure Cooker cooks faster because

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

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Physics
Mica is used in electrical appliances such as electric iron because mica is

a good conductor of heat but a bad conductor of electricity
a good conductor of heat as well as electricity
a bad conductor of heat as well as electricity
a bad conductor of heat but a good conductor of electricity

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