Easy zener diode circuit questions

[gneill]

I don't understand what you mean. :/

If your load current is 5 mA, what is the voltage V₁ in the following diagram?

Can I ask one more question about this circuit. What is zener voltage supposed to be? 9.1?

Yes.

 

[nothing909]

If your load current is 5 mA, what is the voltage V₁ in the following diagram?
View attachment 108524Yes.

The voltage is 5V.

And just quickly about that second circuit, just so I know this is correct. The reading on the voltmeter would be 9.1V and the reading on the ammeter would be:

Voltage across resistor = 20 - 9.1 = 10.9V

Reading on ammeter = 10.9/10000 = 1.09mA

 

[gneill]

The voltage is 5V.

Correct. Which is less that the zener voltage of 5.1 V. So the zener placed there would not conduct. That's the test I was urging you to carry out.

And just quickly about that second circuit, just so I know this is correct. The reading on the voltmeter would be 9.1V and the reading on the ammeter would be:

Voltage across resistor = 20 - 9.1 = 10.9V

Reading on ammeter = 10.9/10000 = 1.09mA

Yes, that looks good.

 

[nothing909]

Correct. Which is less that the zener voltage of 5.1 V. So the zener placed there would not conduct. That's the test I was urging you to carry out.

Yes, that looks good.

okay, great, thanks very much for all your help. :)