Finding the value of this load resistor

[Bolter]

Homework Statement

Calculate the resistance of load resistor

Relevant Equations

V = IR

Question:

I first knew that this would be a series circuit setup, there the current all around the circuit would be the same.

It's given that when it's a open circuit, p.d. across the output is 4000V hence the emf is therefore 4000V. When it gets connected to a load resistor, the voltage share is 3000V thus the voltage share on the internal resistance of the voltage supply must be 1000V

From this I can work out the current flowing through the circuit which gave me 4.1666... x10^-5 Amps

This should mean that 4.1666... x10^-5 amps is also passing through the load resistor, so the resistance of the load resistor is R = V/I or 72 Mega ohms

Any help would be really appreciated. Thanks!

 

[BvU]

No help possible, except to convince you you are doing OK...

 

[Bolter]

No help possible, except to convince you you are doing OK...

Ok thanks, I’m sure I am doing it right. It’s just that sometimes I make silly mistakes that I don’t tend to see at all but others can. But I checked again just to be sure