Delmars Unit 16 Inductance in AC Circuits
Two inductors are connected in series to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____. 553.44 Ω 1508 Ω 42.5 Ω 365.5 Ω
1508 Ω
An inductor has an inductive reactance of 12 Ω, and a wire resistance of 16 Ω. What is the impedance of the inductor? 4 Ω 28 Ω 400 Ω 20 Ω
20 Ω
Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 0.15 H and 0.225 H. The total inductive reactance is _____. 3.54 A 5.41 A 6.12 A 4.84 A
3.54 A
An inductor is connected to a 120-V, 60-Hz supply. The current in the circuit is 2.4 A. What is the inductive reactance? 288 Ω 104.8 Ω 50 Ω 57.08 Ω
50 Ω
Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____. 942.5 Ω 1508 Ω 533.49 Ω 525.5 Ω
533.49 Ω
An inductor has an inductive reactance of 64 Ω, and a wire resistance of 36 Ω. What is the impedance of the inductor? 28 Ω 10 Ω 73.4 Ω 82.92 Ω
73.4 Ω
The symbol for reactive power of an inductor is _____. VA P W VARs
VARs
The symbol for reactance is _____. L RL XL H
XL
The unit of inductance is the _____. henry reactance ohm hertz
henry
The total current-limiting effect is called _____. resistive reactance impedance inductive resistance reluctance
impedance
When a magnetic field continually changes magnitude and direction, a voltage is continually being induced in the coil. This voltage is called _____ voltage. inductive conducted applied induced
induced
Circuits are generally considered to contain _____ when any type of load that contains a coil is used. inductance reactance volt-amperes resistance
inductance
The symbol XL stands for _____. inductive resistance inductive reactance resistive reactance resistance
inductive reactance
In a pure inductive circuit, current _____. leads voltage by 90° lags voltage by 90° is in phase with voltage lags voltage by 180°
lags voltage by 90°
The amount of resistance compared with the inductive reactance determines the _____ of the coil. phase angle (θ) reactance (X) power factor (PF) quality (Q)
quality (Q)
The current-limiting property of an inductor is called _____. resistance reactance inductance henrys
reactance
Volt-amperes-reactive is used to measure the _____ in a pure inductive circuit. volt amperes reactive power watts joules
reactive power
An inductor is connected to a 240-V, 60-Hz supply. The current in the circuit is 5 A. What is the inductance of the inductor? .1185 H .0048 H .127 H .0075 H
.127 H
An inductor is connected to a 60 Hz circuit. The inductive reactance is 75.4 Ω. What is the inductance of the inductor? 4524 H 284 H 5 H 0.2 H
0.2 H
Two inductors are connected in series to a 120-V, 60-Hz supply. The values of the inductors are 0.175 H and 0.255 H. The total circuit current is _____. 0.74 A 3.067 A 1.85 A 1.02 A
0.74 A
An inductor with an inductance of three henrys (H) is to be connected to a 60 Hz circuit. What will the inductive reactance be? 360 Ω 180 Ω 565 Ω 1131 Ω
1131 Ω
