When a voltage of 120 V is impressed across an electric heater, a current of 0.22 A will flow through the heater if the resistance is ____________ Omega.
To find the resistance (Ω), you can use Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage impressed across it and inversely proportional to its resistance. The formula for Ohm's Law is:
Resistance (Ω) = Voltage (V) / Current (A)
Given that the voltage (V) is 120 V and the current (A) is 0.22 A, we can substitute these values into the formula to find the resistance:
Resistance (Ω) = 120 V / 0.22 A
Now, let's calculate it:
Resistance (Ω) = 545.45 Ω
Therefore, the resistance of the electric heater is approximately 545.45 Ω when a voltage of 120 V is impressed across it and a current of 0.22 A flows through it.