PHEP Chapter 17

Question 1

What best defines a cycle

Answer 1

two alternations, one in each direction

Question 2

How many times larger is the max voltage value than the effective voltage value

Answer 2

0.707

Question 3

what is another name for effective values

Answer 3

root mean square value

Question 4

Does an AC amp produces heat at the same rate as a DC amp

Answer 4

yes

Question 5

what is the direction of a vector indicated by

Answer 5

a line segment and arrow

Question 6

what is the magnitude of a vector indicated by

Answer 6

length of line

Question 7

in what direction is positive rotation of a vector

Answer 7

counter clockwisewha

Question 8

what effect does self induced voltage have on applied voltage

Answer 8

it opposes it and reduces effectiveness

Question 9

what variables determine inductive reactance

Answer 9

2pi constant, frequency, inductance

Question 10

what is the relationship between current and applied voltage in a purely inductive circuit

Answer 10

current lags 90 degrees

Question 11

what can offers resistance to current flow

Answer 11

inductive reactance and resistance

Question 12

in a purely inductive reactant and resistant circuit what is the current applied voltage relationship

Answer 12

current lags by 45 degrees

Question 13

what are the units of capacity

Answer 13

farrads

Question 14

what is power factor

Answer 14

ratio of true power to apparent power