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Biology, 28.08.2019 10:00 mollykay2001p3qo0j

Why is a switch used in an electric circuit?
a. it is used to increase the power.
b. it is used to open and close the circuit.
c. it is used to decrease the magnetism.

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Why is a switch used in an electric circuit?
a. it is used to increase the power.
b. it...
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