The ratio between the input energy to the output energy of a machine is called its efficiency.

True

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False

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Solution

The correct option is A True
Efficiency of machine: The ratio between the output energy of the machine to the input energy is called the efficiency of the machine.
Efficiency = $\frac{o u t p u t e n e r g y}{i n p u t e n e r g y} = \frac{w o r k d o n e b y t h e m a c h i n e}{w o r k d o n e o n t h e m a c h i n e}$
Hence, the given statement is true.

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