Understanding Ohm's Law

Ohm's Law is the fundamental relationship between voltage (V), current (I), and resistance (R):

* V = I * R

Where:

* V is voltage (measured in volts)

* I is current (measured in amperes or amps)

* R is resistance (measured in ohms)

Solving for Resistance

1. Convert milliamperes (mA) to amperes (A):

200 mA = 0.2 A

2. Rearrange Ohm's Law to solve for resistance:

R = V / I

3. Plug in the values:

R = 20V / 0.2A

4. Calculate the resistance:

R = 100 ohms

Therefore, the resistance of the material is 100 ohms.