Question

Most electrical appliances are rated in watts. Does this rating depend on how long the appliance is on? (When off, it is a zero-watt device.) Explain in terms of the definition of power.

a) Yes, the rating depends on the duration of operation.
b) No, the rating is independent of the duration of operation.
c) The rating is directly proportional to energy consumption.
d) The rating is inversely proportional to energy consumption.

Answer 1

The rating of electrical appliances in watts does not depend on how long the appliance is on, as power is defined as the rate at which work is done or energy is transferred. An appliance with a higher power rating will consume more energy per unit time compared to an appliance with a lower power rating.

Step-by-step explanation:

The rating of electrical appliances in watts does not depend on how long the appliance is on.

The rating is independent of the duration of operation.

This is because power, which is measured in watts, is defined as the rate at which work is done or energy is transferred.

It is the amount of energy consumed per unit time.

An electrical appliance with a higher power rating will consume more energy per unit time compared to an appliance with a lower power rating, regardless of how long they are used.