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.

Solution

## (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.ScienceLakhmir Physics (2020, 2021)All

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