Voltage, Current and Resistance – 3

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3. Current flows in a circuit when ________.

(a) a switch is opened
(b) a switch is closed
(c) the switch is either open or closed
(d) there is no voltage

Answer
Answer : (b)
Explanation
Explanation :
When switch is opened, circuit is open and current does not flow.
When switch is closed, circuit is closed and current flows in the closed circuit.
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