AC Theory Level 1, 3rd Edition Lesson 3: Becoming Familiar with Inductive reactance

A purely inductive 120-volt, 60-hertz circuit draws 2.7 amperes. What is the reactance of the circuit? (Round the FINAL answer to one decimal place.)

44.4 Ohms

Given a 2-henry inductor connected to a 500-volt, 60-hertz source, solve for the following: (Round the FINAL answers to at least two decimal places in the specified unit.)

753.98 663mA

A 750-millihenry inductor has 20 volts dropped across it when five milliamperes flow in the circuit. What is the frequency? (Round the FINAL answer to two decimal places.)

849.26

A circuit has a voltage of 240 volts and an inductive reactance of 30 ohms. What is the current flow?

8A

Complete the following statements. If the frequency increases, the inductive reactance ? .Answer 1Choose...has no changeincreasesdecreasesIf the inductance is increased, the inductive reactance ? .

Increases Decreases

Complete the following statements by dragging the appropriate term at the bottom to the space next to it.

L HENRIES XL OHMS

An inductor in a 60 hertz circuit has 80 volts AC across it with four amperes flowing through it. What is the inductance of the inductor? (Round the FINAL answer to three decimal places.)

.0531

Find the current through a 107-millihenry inductor if it is connected to a 6-volt, 400-hertz source. (Round the FINAL answer to three decimal places.)

0.022A

A 50-millihenry coil is connected to a 60-hertz, 240-volt source. How much current flows? (Round the FINAL answer to one decimal place.)

12.7 Amps

A coil has an inductance of 250 millihenries. Find its inductive reactance at 60 hertz.

94.2 Ohms

A coil is connected to a 300-volt, 60-hertz circuit and draws a certain current. If the voltage remains 300 volts, and the frequency is increased to 400 hertz, the current would ? .

B

A manufacturer could produce a coil (inductive reactor) and put XL = 8 ohms on the nameplate only if the coil is labeled with the proper operating ? .

B

Inductive reactance causes current to lag the voltage by ? .

B

What is the opposition to current flow in an AC circuit caused by an inductor called?

B

Give the formula used to calculate inductive reactance

C

In a DC circuit, what limits current flow?

C

The reactance of an inductive circuit depends upon the resistance of the coil and the frequency of the circuit.

False

Knowing the voltage and the inductive reactance of a purely reactive circuit, drag the variables to the correct locations to create the formula used to solve for the current.

I=E/XL