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21-03-2017
Physics

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How much current is flowing through a circuit that requires 120 w of power from a 6 v battery?
a. 10 a
b. 20 a
c. 30 a
d. 720 a

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21-03-2017

Power = VI
⇒ 120 = 6 * I
⇒ I = 120/6 = 20A

Answer is B

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