Question

the potential drop across the 10k ohm resistor is 100v what is the current through the resistor​

Answer 1

Not enough information. BTW, I don’t think you mean “voltage drop after the resistor”. You either mean “voltage drop across the 100 ohm resistor” or “voltage after the resistor”.

What is the load after the 100 ohm resistor? Without a load or connection on the end of the 100 ohm resistor, there is no current, therefore no voltage drop.

If you know the resistance of the load from the 100 ohm resistor to circuit common/ground, then it is a simple matter of using Ohm’s Law to find the current, then Ohm’s Law again to find out how much of the voltage is dropped across the 100 ohm resistor, and how much across the load.

Ohm’s Law is only for linear resistance.

V = IR where V is voltage across R, I is current through R, and R is the resistance.

Algebra can pick out current.

I = V/R

In this case, I = 5 volts/(100 ohms plus load resistance)

Then you can use V = IR to calculate the voltage drop across the 100 ohm resistor.

Answer 2

Answer:

Example: What power rating does a 10K resistor need to be if it is used as a decoupling filter in a power supply, and a total current of 10mA will be flowing through it? The answer can be found by using equation (1): P = I2R = (10mA)2 * 10K = 1 Watt.

hope this helps u