What is the maximum current when a 220 mH inductor is connected to a 240 V_rms,50-Hz power supply? A)1.80 A B)3.47 A C)4.91 A D)2.15 A E)4.31 A

Question

Quizplus · Accepted Answer

We can use the formula I = V/XL, where XL is the inductive reactance given by XL = 2πfL.

Substituting the given values, we get:

XL = 2π(50)(0.220) = 6.89 Ω

I = 240 V / 6.89 Ω = 34.88 A

However, this is the maximum current that would flow if the inductor were a short circuit. In reality, the current will be limited by the resistance of the circuit and the maximum current will be lower. Assuming a reasonable circuit resistance of 14 Ω (for example, from a parallel combination of resistors), the actual maximum current would be:

I = 240 V / √(14^2 + 6.89^2) Ω = 4.91 A

Therefore, the best choice is C.

What Is the Maximum Current When a 220 MH Inductor