Question

You know that a load connected to a circuit is using 0.4 kW of power, and the resistance of the load is 40 ohms. What is the current drawn by the load?

a) 0.01 A
b) 0.02 A
c) 0.1 A
d) 1 A

Answer 1

The calculated current drawn by a load using 0.4 kW of power with a resistance of 40 ohms is 3.16 A, which doesn't match any of the provided options. This indicates a possible error in the question or provided options.

Step-by-step explanation:

To determine the current drawn by the load using 0.4 kW of power with a resistance of 40 ohms, you first need to convert kilowatts to watts.

0.4 kW = 400 W. The formula for power (P) in terms of current (I) and resistance (R) is:

P = I2 × R

By rearranging the formula to solve for the current, we get:

I = √(P/R)

Substituting the given values:

I = √(400 W / 40 Ω)

I = √(10)

I = 3.16 A

However, this is not one of the provided answer choices. Based on the calculation, there seems to be an error somewhere. If we stick strictly to the provided options, recognizing that all of them are lower than the calculated current, it is not possible to select the correct answer from a), b), c), or d).