O-LevelPhysicsElectricity5054/11 · May/June 2019 · Q391 Mark
A car battery supplies a current in one direction. A current in the opposite direction recharges the battery. Which circuit recharges the battery, using an alternating current (a.c.) supply and a diode?
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ACircuit showing an AC supply connected to a diode, which is then connected to a battery, with the diode allowing current to flow into the positive terminal of the battery.
BCircuit showing an AC supply connected to a diode, which is then connected to a battery, with the diode allowing current to flow out of the positive terminal of the battery.
CCircuit showing an AC supply connected to a diode, which is then connected to a battery, with the diode allowing current to flow into the negative terminal of the battery.
DCircuit showing an AC supply connected to a diode, which is then connected to a battery, with the diode allowing current to flow out of the negative terminal of the battery.
✓ Correct answer
A: Circuit showing an AC supply connected to a diode, which is then connected to a battery, with the diode allowing current to flow into the positive terminal of the battery.
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