A ______ is an electrical device that converts alternating current to direct current which flows only in one direction.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. rectifier.
- A rectifier is an electrical device that converts alternating current (AC) to direct current (DC) which flows only in one direction.
- Rectifiers use components like diodes to allow current to flow in a single direction, effectively converting AC to DC.
Other Options:
- Transformer: A device used in electrical circuits to transfer electrical energy between two or more circuits through electromagnetic induction.
- Ammeter: It is an instrument used to measure electric current in a circuit.
- Voltmeter: It is an instrument used to measure the electrical potential difference (voltage) between two points in a circuit.