Question

A rectifier is used to

• A. convert a.c. to d.c.
• B. amplify a weak signal
• C. generate intermittent voltage
• D. convert d.c. to a.c.

Hint:

Think of a rectifier as a "one-way street" sign for electricity. Because diodes only let current flow one way, they chop off or flip the reverse part of an AC wave, leaving you with DC.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
We need to identify the primary function of a rectifier in an electronic circuit.

Step 2: Detailed Explanation:
Let's define the roles of the devices mentioned in the options:
1.

Amplifier: Used to increase the amplitude of a weak signal (matches option B).
2.

Oscillator: Used to generate an intermittent or continuous periodic waveform (matches option C).
3.

Inverter: Used to convert direct current (d.c.) into alternating current (a.c.) (matches option D).
4.

Rectifier: An electrical device composed of one or more diodes that allows current to flow in only one direction. It is specifically used to convert bidirectional alternating current (a.c.) into unidirectional direct current (d.c.).

Step 3: Final Answer:
A rectifier is used to convert a.c. to d.c., matching option (A).