RST Study - AC Theory

Question 1

What is the formula for Inductive Reactance?

Answer 1

XL=2πf*L

Question 2

What is the formula for Capacitive Reactance?

Answer 2

XC=1 / (2πf*C)

Question 3

What is the formula for Impedance?

Answer 3

Z = √(R² + (XL-XC)²)

Question 4

What is the formula for power factor?

Answer 4

Power factor = true power/apparent power

Question 5

Define an Overload condition

Answer 5

More current present in a circuit than it is normally designed to handle.

Question 6

Resistance, eddy currents, and the skin effect all ?

Answer 6

Resist Current flow

Question 7

What is the formula for adding resistors in series?

Answer 7

RT = R1 + R2 + … RN

Question 8

What is the formula for adding capacitors in series?

Answer 8

CT = 1 / ( 1/C1 + 1/C2 + … 1/CN )

Question 9

What is the formula for adding inductors in series?

Answer 9

LT = L1 + L2 + … LN

Question 10

What is the formula for adding resistors in parallel?

Answer 10

RT = 1 / (1/R1 + 1/R2 + … 1/RN)

Question 11

What is the formula for adding capacitors in parallel?

Answer 11

CT = C1 + C2 + … CN

Question 12

What is the formula for adding inductors in parallel?

Answer 12

LT = 1 / (1/L1 + 1/L2 + … 1/LN)

Question 13

Capacitors block ?

Answer 13

DC Voltage

Question 14

Capacitors tend to resist changes in ?

Answer 14

Voltage

Question 15

Inductors tend to resist changes in ?

Answer 15

Current