Question

Nichrome wire is used in some radiative heaters. Find the resistance needed if the average power output is to be 1.00 kW utilizing 120-V AC.

a. 144 Ω
b. 100 Ω
c. 120 Ω
d. 240 Ω

Answer 1

To find the resistance needed for a radiative heater with an average power output of 1.00 kW and utilizing 120-V AC, we can use Ohm's Law. The resistance needed is 14.4 Ω.

Step-by-step explanation:

To find the resistance needed for a radiative heater with an average power output of 1.00 kW and utilizing 120-V AC, we can use Ohm's Law. Ohm's Law states that resistance (R) is equal to voltage (V) divided by current (I).

Using the formula R = V^2 / P, where V is the voltage and P is the power, we can calculate the resistance:

R = (120^2) / 1000 = 14.4 Ω

Therefore, the resistance needed is 14.4 Ω, which is not one of the provided options.