Am i correct?
If a 10.0 kW device pulls 20.0 A of current, what voltage exists across it?
A. 5.0 *10^0 V
B. 5.0 *10^1 V
C. 5.0 *10^2 V
D. 5.0 *10^3 V <---
Power = VI, compatible units are W, V, A.
10 kW = V(20 A)
NOTE: 10 kW = 10000 W
10x10^3 W
10,000/ 2A
= 5000
which would be D right?
i mean its, C :)
10,000/ 20 A
= 500
That's correct!
To determine the voltage across the device, we can use the formula:
Power (P) = Voltage (V) x Current (I)
Given that the device has a power of 10.0 kW (kilowatts) and a current of 20.0 A (amperes), we need to rearrange the formula to solve for voltage.
Divide both sides of the equation by the current:
Voltage (V) = Power (P) / Current (I)
Substitute the given values:
Voltage (V) = 10.0 kW / 20.0 A
To simplify calculations, we need to convert kilowatts to watts:
10.0 kW = 10,000 watts
Plug in the values:
Voltage (V) = 10,000 W / 20.0 A
Calculating this equation, we find that the voltage across the device is:
Voltage (V) = 500 V
Therefore, the correct answer is:
D. 5.0 * 10^2 V