There are two types of transformers which are step-up transformer and step-down transformer.
A tool used to efficiently convert the input power to the output power without any heat loss to the environment.
It has \(100 \%\) efficiency.
\(\begin {aligned} \text {Output power} &= \text {Input power} \\ P_s &= P_p \\ V_s \space I_s &= V_p \space I_p, \end {aligned} \)
\(\begin {aligned} \text {Efficiency} &= \dfrac {\text {Output power}}{\text {Input power}} \times 100\% \\ &= \dfrac {V_s \space I_s}{V_p \space I_p} \times 100\%. \end {aligned}\)
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