An AC current can be produced by

Question

Question

This question was previously asked in

69th BPSC Prelims Exam Official Paper (Held On: 30 Sept, 2023)

Answer 1

The correct answer is dynamo.

Key Points

An alternating current (AC) can be produced by a dynamo.
A dynamo is a device that generates electricity through the use of electromagnetic induction. It consists of a coil of wire that rotates within a magnetic field.
As the coil of wire rotates, it cuts through the lines of magnetic flux, which induces an alternating current in the wire.
This process is based on Faraday's law of electromagnetic induction, which states that a change in magnetic flux through a closed loop of wire will induce an electromotive force (emf) in the wire, resulting in an alternating current.
The direction of the current changes as the coil of wire rotates, leading to an AC output.
Dynamo generators were commonly used in the past to produce electricity, and they are still used in some applications today, although they have been largely replaced by more efficient and reliable alternators and other AC generators in most modern electrical systems.