Created by StemPy LabTo make a potentiometer more sensitive, one should
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← A cell balances at 570 cm on a potentiometer wire when it is open. With a 10 Ω resistor across it, it balances at 456 cm. What is the internal resistance of the cell?An uncharged capacitor of 20 µF is being charged through a resistor by an ideal 50 V battery. At the moment the charging current has fallen to half its starting value, the battery is suddenly turned round, so that its terminals are reversed in the circuit. How much heat is produced in the resistor from that moment until the current has died away? →
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