A rectifier is a device which converts alternating current (or voltage) into unidirectional current (or voltage).

True

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False

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Solution

The correct option is A True
A rectifier is an electrical device that converts alternating current (or voltage), which periodically reverses direction, to direct current (or voltage), which is unidirectional.

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\begin{matrix} Device & Principle 1 & Electric Motor & a & Magnetic effect of current 2 & Dynamo & b & Increase or decrease the alternating voltage 3 & Transformer & c & Converts mechanical energy to electrical energy 4 & Electric Bell & d & Converts electrical energy to mechanical energy \end{matrix}

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