Physics, asked by pinkytulsani24, 1 year ago

Why is there a key in an electrical circuit

Answers

Answered by john44
21
to open or close the circuit
Answered by hasmithraa29
76
A key is present in a electric circuit because, it acts like a switch to pass and stop the flow of current. If a switch is not present then the battery which we use will get used up quickly. It helps us to conserve energy. It also breaks the current when we need it to. It is also known as a plug key.
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