Question

31. (a) Define power.
(b) What is the SI unit of power?
(c) What is the commercial unit of electrical energy?​

Answer 1

Answer:

a- Power is the rate at which energy is transferred.

b- SI unit of power is watt.

c- Commercial unit of electrical energy is kWh, ie, kilowatt-hour

Answer 2

Answer:

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a) In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.

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b) Watt

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c) kWh

The commercial unit of electrical energy is a kilowatt-hour (kWh). The electric energy used in factories, industries and houses which are measured in kWh.

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