last test before final

Question 1

Xl=

Answer 1

6.28xFxL

Question 2

Xc=

Answer 2

1/6.28xFxC

Question 3

Z means

Answer 3

impedance

Question 4

In a pure _____ _______,voltage and current are in phase with each other

Answer 4

resistive circuit

Question 5

In a pure _____ _____,voltage and current are 90 degrees out of phase with each other

Answer 5

inductive circuit

Question 6

E=LxI

Answer 6

RL circuit voltage leads current

Question 7

I=CxE

Answer 7

RC circuit current leads voltage

Question 8

The cosine of the angle theta is equal to

Answer 8

the power factor

Question 9

VARs

Answer 9

volts-amps-active

Question 10

VA

Answer 10

volts-amps

Question 11

The true side of the triangle is measured in ?

Answer 11

watts

Question 12

Draw a triangle and show what side the reactive, apparent , and true sides are

Answer 12

reactive (VARs), apparent (VA), true (watts)

Question 13

total current through the parallel circuit is equal to ____________

Answer 13

the sum of the individual currents

Question 14

in a series LC circuit, _____ and _____ values are ____ degrees out of phase with each other and results in a voltage that is ____ than the larger of the two

Answer 14

inductive, capacitive, 180, less

Question 15

in a parallel LC circuit current ____ voltage by 90 degrees through the inductor

Answer 15

lags

Question 16

in a parallel LC circuit current ____ voltage by 90 degrees through the capacitor

Answer 16

leads

Question 17

power factor is important in____

Answer 17

industrial applications

Question 18

polar notation is described by ______ and ______?

Answer 18

magnitude and angle

Question 19

the higher the percentage the ______

Answer 19

smaller theta