I have a very simple circuit: a 9V battery is connected to a 1500ohm resistor, which is connected in series to the multimeter and back to the battery.
According to Ohm's Law, I should get:
I = V/R = 9.15V (measured) / 1496ohm (measured) = ~0.00612A = 6,12mA
I set my multimeter to 200mA reading and I get 30.2mA. Then I set my multimeter to 20mA reading and I get 7.89mA.
Why do I get two different amperages when I set a different limit? Why are the readings so off compared to the theoretical amperage? I just don't get it.
I don't have another multimeter right now so I can't verify whether my unit is faulty or I'm doing something wrong.
The same issue occurs when I add a led diode to the circuit (which draws approximately 2V, so I consider a difference of voltage of 7V instead of 9V): the readings are off.
I just started with electronics, so maybe this is a stupid question, but I can't wrap my head around it.