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28 May, 12:12

Find the current through a resistor of 2.0ohm if the p. d across it is 0.5v?

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  1. 28 May, 12:21
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    Voltage (potential difference) across any component = (current) x (resistance)

    0.5 volt = (current) x (2 ohms)

    Divide each side by 2 ohms:

    Current = 0.5 / 2 = 0.25 Ampere = 250 mA
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