a heater is plugged into 120v wall outlet. if the resistance in the heater is 15ohms what is the power used
P = E^2/R = 120^2/15 = 960W
To calculate the power used by the heater, we can use the formula:
Power = (Voltage^2) / Resistance
Given:
Voltage (V) = 120V
Resistance (R) = 15 ohms
Now, let's substitute these values into the formula and calculate the power used:
Power = (120V)^2 / 15 ohms
Power = (14400V^2) / 15 ohms
Power = 960W
Therefore, the power used by the heater is 960 Watts.