# Inductance problem

## Homework Statement

An inductor has an inductance of 0.45 H and internal resistance of 2.5 . If the H
inductor is connected to a 120-V (rms) source at 60 Hz, what is the current (rms) through
it?

XL=2pi*f*L
V=IR

## The Attempt at a Solution

I don't have any idea and my brain is wrecked! I'm having a difficult time finding this bridge.

## Answers and Replies

You don't want to use V=IR, that doesn't take into account the reactance of your inductor. For a simple LR circuit V=IZ.

Even using Z, I still arrive at 48 A. 120/2.5 = 48 A Which is not the correct answer. It is .7 A.

Last edited:
I get I = 0.707 A.

Z≠2.5Ω.

NascentOxygen
Staff Emeritus
Science Advisor

## Homework Statement

An inductor has an inductance of 0.45 H and internal resistance of 2.5 . If the H
inductor is connected to a 120-V (rms) source at 60 Hz, what is the current (rms) through
it?
How do you determine the impedance of a series circuit of 0.45 H in series with a resistance of 2.5Ω ? You have studied complex number arithmetic?