Physics
The working of the quartz crystal in the watch is based on the

Piezo - electric Effect
Photoelectric Effect
Edison Effect
Johnson Effect

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Physics
Scalar Quantities are

Physical quantities which have no magnitude only and only direction
Physical quantities which have no magnitude and no direction
Physical quantities which have magnitude only and direction
Physical quantities which have magnitude only and no direction

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Physics
Which of the following options correctly explains the term heat budget?

It is the balance between incoming and outgoing radiation
It is the amount of heat which the surface of earth receives from the sun.
It is a mode of transfer of heat through matter by molecular activity.
It is the radiation from the earth in the form of long waves.

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