Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 20 Ω and current is 4.5 amps.
| 30 V | |
| 94 V | |
| 90 V | |
| 81 V |