Question

Fill in the following blanks with suitable words :
(a) Power is the rate of doing ___________.
(b) One watt is a rate of working of one ___________ per ___________.
(c) The electricity meter installed in our homes measure electrical energy in the units of ___________.
(d) The principle of ___________ of energy says energy can be transformed from one form to another, but it cannot be ___________ or ___________.
(e) When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.

Answer 1

(a) Power is the rate of doing work.
(b) One watt is a rate of working of one joule per second.
(c) The electricity meter installed in our homes measure electrical energy in the units of kilowatt- hour.
(d) The principle of conservation of energy says energy can be transformed from one form to another, but it cannot be created or destroyed.
(e) When a ball is thrown upwards, kinetic energy is transformed into potential energy.