An alternating current is converted into direct current by:
Correct answer: C. Rectifier
- A. Dynamo
- B. Transformer
- C. Rectifier
- D. Motor
Explanation
An alternating current (AC) is converted into direct current (DC) by a device called a Rectifier.A rectifier is an electrical device that converts alternating current (AC) to direct current (DC). This is typically achieved by using diodes to allow current flow in only one direction, effectively converting the alternating current to a pulsating direct current. Additional filtering components may be used to smooth out the resulting waveform, producing a more constant DC output.
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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