Hello, EEVblog Forum.
I was getting a bit confused about load resistors for power output measurement.
Specifically, I'd like to measure the power output of a DC motor at different speeds.
I know I can measure the voltage, should I use a load resistor? Why would I use one?
My thought process lead me to thinking that the load resistor would also act as a current shunt.
If I use a 10Ω resistor as a load I can measure the voltage across that.
Does this also mean that this load is also a current shunt which will give me the voltage with when divided by 10 is the current?
I could definitely be mistaken here, I just need someone to clear this up.
Thanks!