If the total resistance in the circuit if 18, and the current is 0.5 Amps, what must the voltage be?
E = IR
I assume this is a DC circuit.
To determine the voltage in the circuit, we can use Ohm's Law which states that voltage (V) is equal to the product of the current (I) and the resistance (R): V = I x R.
Given that the total resistance in the circuit is 18 Ohms (R = 18) and the current is 0.5 Amps (I = 0.5), we can substitute these values into the formula:
V = I x R
V = 0.5 A x 18 Ω
V = 9 Volts
Therefore, the voltage in the circuit must be 9 Volts.