A transformer transforms:
Correct answer: D. Both current and voltage
- A. Current
- B. Voltage
- C. Neither current nor voltage
- D. Both current and voltage
Explanation
A transformer is a device that uses electromagnetic induction to change the voltage and current levels in an AC circuit. By adjusting the number of coils in its primary and secondary windings, a transformer can increase (step-up) or decrease (step-down) the voltage. According to the principle of conservation of energy, as the voltage is transformed, the current inversely changes to maintain power balance (P=VI). Therefore, both current and voltage are transformed in the process.Option D is correct because a transformer affects both voltage and current. Options A and B are incorrect as they consider only one aspect of the transformer's function. Option C is wrong because transformers indeed transform both current and voltage.
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