Deck 7: R-C and R-L Ac Circuits

Question 1

Define an R-L-C circuit.

Answer 1

An R-L-C circuit contains resistance, inductance, and capacitance.

Question 2

Circuits with capacitance or inductance are called reactive circuits, and the total opposition to current flow is called impedance (Z).

Answer 2

True

Question 3

An R-C circuit consists of resistance and inductance.

Answer 3

False

Question 4

The ratio of true power to apparent power is called the power _____________.

Question 5

Capacitive reactance is a capacitor's opposition to __________ flow and is measured in ohms.

Question 6

True power is used in resistive components and is measured in amperes.

Question 7

Describe inductive reactance.

Question 8

The purpose of power factor correction is to make a load appear more ____________, therefore making the power factor closer to 1.

Question 9

In a purely ___________ AC circuit, the energy delivered by the source is stored in the magnetic field during part of the cycle and returned to the circuit in another part of the cycle.

Question 10

Describe the relationship of true, reactive, and apparent power in the power triangle.

Question 11

Define reactive power.

Question 12

When resistance and inductance are both in a circuit, the phase between voltage and current is less than 90 degrees.

Question 13

In AC circuits, the total opposition to current flow is called _____________.

Question 14

How do you calculate power factor?

Question 15

In a purely capacitive AC circuit, all of the energy is stored in the capacitor during part of the cycle and then returned to the circuit during another part of the cycle.