Define: (i) Efficiency (ii) Voltage regulation of transformer.
i) Efficiency : It is the ratio of output power to the input power of the transformer.It is denoted by η.
ii) Voltage Regulation of transformer: The ratio of the change in Secondary
Terminal Voltage from no load to full load (VFL ) to no load voltage.(VNL)
The Regulation is usually expressed in percentage of no load Secondary terminal Voltage. So
where,
VNL = No Load Secondary voltage
VFL = Full load secondary voltage