Answer: current = 16.25A
Explanation:
Stereo = 360w, computer = 30w, laser light projector = 1200w, 3 120w- lights = 3 * 120 = 360w
Total power = 360 + 30 + 1200 + 360 = 1950W.
Voltage across the mains = 120v.
Power = current * voltage
1950 = current * 120
current = 1950/120
current = 16.25 A
16.25A
Power (P) is related to current(I) and Voltage (V) as follows;
P = I x V ----------------(i)
That means that power is the product of current and voltage. It is measured in Watts(W).
Given;
360W stereo
30W computer
1200W laser light projector
three 120W light bulbs
From the given data, we can calculate the total power(P) consumed as follows;
P = 360W + 30W + 1200W + (3 x 120W)
P = 1950W
Also, as stated in the question, the house is wired for 120Volts.
Therefore we can calculate the current that will be pulled by these devices by substituting P = 1950W, V=120V into equation(i) above;
=> P = I x V
=> 1950 = I x 120
Solve for I;
I = 1950 / 120
I = 16.25A
Therefore, the current pulled is 16.25A
