Ohm’s law is not obeyed by
Right Answer is:
Ohms Law applies to metal conductors – but only if they are kept at a constant temperature. Then the current in the metal will be proportional to the applied voltage. This means that a graph of current against voltage will be a straight line.
- Some conductors don’t obey Ohms’s Law at all. This is especially true of semiconductors where the number of particles that actually carry the current can change with circumstances.
- For example, a light-dependent resistor will have more free electrons to carry current when the light on it is brighter.
- A semiconductor diode is used in electronic circuits because it obeys Ohm’s Law in one direction (more or less) but doesn’t allow any current at all to pass in the opposite direction.