Yo people a quick question,
As you know, a diode only conducts if the pd across it exceeds 0.6V so...
The diode is placed in the forward direction in series with a 1.5V cell and a 2.2k resistor.
The question asks for the pd in the resistor...
Would it simply be 1.5 - 0.6 = 0.9V?
Diode in circuit Watch
- Thread Starter
- 01-12-2010 21:04
- 01-12-2010 21:14
If it has to exceed 0.6V then pd has to be less than 0.9V. But yeah your answer is fine enough
- 02-12-2010 11:35
V(diode) + V(resistor) = 1.5
V(resistor) = 2.2k times I
V(diode) = diode formula (which you should have been given) times I
So diode formula + 2.2K = 1.5/I
so now you have the current going through the circuit. From that you can work out the pd across the resistor.