Pick out the wrong statement.
- AIn a simple battery circuit,the point of lowest potential is the negative terminal of the battery.
- BThe resistance of an incandescent lamp is greater when the lamp is switched off.
- CAn ordinary $100\, W$ lamp has less resistance than a $60\, W$ lamp.
- DAt constant voltage,the heat developed in a uniform wire varies inversely as the length of the wire used.
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