Question

A _____ increases or decreases voltage in a power line

1). motor
2). generator
3). ammeter
4). transformer

Answer 1

A transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction. Transformers are mainly used to increase or decrease voltage in power lines or electric power applications. So your answer would be D. transformer

Answer 2

The correct answer is 4.

Step-by-step explanation:

A transformer is an electrical element that allows increasing or decreasing the voltage in an alternating current electrical circuit, maintaining the power that enters the equipment, in the case of an ideal transformer, constant at the output. Basically, it converts the alternating electric energy of a certain voltage level into alternating energy of another voltage level, based on the phenomenon of electromagnetic induction.

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