Chapter 8, Electromagnets, Inductors, and Transformers

As current passes through a conductor:

When an electromagnet reaches maximum strength, it is considered to be:

A rapidly reversing magnetic field causes heat dissipation know as:

A conductor’s magnetic field causes heat dissipation know as:

Electromagnetism induction is the generation of:

An inductor is rated by a unit named:

What is one characteristic of an induction?

Inductance is the ability of a coil to oppose:

The formula to determine total inductance when inductors are connected in parallel is similar to:

10. Three parallel inductors of 84 mh, 96 mh, and 160 mh, will provide a total inductance of how many millihenrys?

Opposition to current flow without the dissipation of energy is called:

In an inductive circuit, reactance will:
XL = 2^ f L

What is the phase angle in a purely inductive circuit?

14. What is the inductive reactance of a 1mH coil, when the applied frequency is 15 kHz?

XL = 2^f L
= 2^(15,000Hz)(.001H)
= ?

15. What is the impedance of a 1 kHz series RL circuit, when R and XL are both 1000 ohms?

Z = R2 + XL2
= (1000)2 + (1000)2
= ?

What is the total impedance of a series circuit, when the applied frequency is 455 KHz, and L=10 mH?

XL = 2^ f L = 2^ (455,00)(.010)
XL = 28.59 Kohm
Zt = (15.)2 + (28.59)2
= ?

What is the true power of a 24 Vac parallel RL circuit, when R = 45 ohms, and XL = 1100 ohms?

P true = (Vs)2 / R

(24v)2 / 45ohm
= ?

The circuit impedance for a 60 Vac single coil circuit that has a coil current of 4.47 amps is:

V = I Z / Z = V
60v/4.47=?