Introduction to Reactance

The vertical bars on either side of a mathematical quantity mean

magnitude

As the frequency increases capacitive reactance

decreases

As the frequency increases inductive reactance

increases

inductance is measured in henrys

true

it is difficult to start current in an inductor and it is likewise difficult to stop current flowing in an inductor.

true

The reactance of the series combination of a capacitor and an inductor is given by

| XL - XC |

What is the calculation for inductive reactance?

2 x pi x (henry x hertz)

The correct equation for inductive reactance is

2 x pi x f x L

A 115 volt 60 Hz source is connected to a 0.5 Henry inductor. What is the current through the inductor?

0.61 amps Get inductive reactance first. 2 x pi (60 x .5) = 188.5 Then, calculate for current. I = E / xL 115 / 188.5 Current = 0.61 amps

The capacitive reactance of a 220 microfarad capacitor at 1000 Hz is

0.723 ohms 1 / (2 x pi x frequency x farads)

What is the calculation for capacitative reactance?

1 / (2 x pi x frequency x farads)

What is the inductive reactance of a 0.01 Henry inductor at 440 Hz?

27.65 ohms 2 x pi (henrys x frequency)

How do you calculate for the current flowing through an inductor?

First, get inductive reactance. Then, the formula is voltage divided by ohms. I = E / xL

Using Ohms Law, what happens to the reistance of a circuit if the current is decreased and the voltage remains the same?

it increases

reactance

the nonresistive component of impedance in an AC circuit, arising from the effect of inductance or capacitance or both and causing the current to be out of phase with the electromotive force causing it. Measured in ohms. Unlike resistance, reactance changes as the frequency of the AC signal changes.