(d) voltage and current
Ans : D
What is a Transformer?
A transformer is defined as a passive electrical device that transfers electrical energy from one circuit to another through the process of electromagnetic induction. It is most commonly used to increase (‘step up’) or decrease (‘step down’) voltage levels between circuits.
- A transformer transforms both current and voltage
- It is an electrical device that transfers electrical energy from one electric circuit to another, without changing the frequency
- A step-up transformer, step up the voltage and step-downs the current
- A step-down transformer, step-downs the voltage and step-ups the current