4th Period Math Applications

Question 1

What components does a RLC cct have?

Answer 1

Resistive (R)
Inductive (L)
Capactive (C)

Question 2

Impendance (Z) is the total opposition?

Answer 2

To the flow of current in a ac cct

Question 3

Inductive Reactance causes current lag or lead?

Answer 3

Lag voltage

Question 4

Capacitive reactance causes current to lead or lag?

Answer 4

Lead voltage

Question 5

Inductance in a cct opposes a change in current by

Answer 5

Inducing a counter electromotive force (cemf)

Question 6

Inductance in a coil or cct is measured in?

Answer 6

Henrys (H)

Question 7

Inductive reactance is directly or indirectly porportional to frequency and inductances?

Answer 7

Directly

Question 8

Capacitance is measured in?

Answer 8

Farads (F)

Question 9

What is Capacitance (C)

Answer 9

Property of a cct that allows it to store energy in the electrostatic field and release it back into the cct

Question 10

Capacitive reactance is measured in?

Answer 10

Ohms

Question 11

The opposition in a capacitive ac cct causes current to lead or lag voltage?

Answer 11

Current to lead voltage by 90°

Question 12

Capacitive reactance is indirectly or directly proportional to frequency and capacitance?

Answer 12

Is indirectly proportional to both frequency and capacitance

Question 13

Impedance definition

Answer 13

Impedance is the total opposition to the flow of current in a ac cct

Question 14

Inductive reactance causes to current and voltage lag lead??

Answer 14

Inductive reactance causes current to lag voltage

Question 15

Capacitive reactance causes to current and voltage? Lead lag?

Answer 15

Capacitive reactance causes current to lead voltage

Question 16

Inductive reactance and current in a ac cct?

Answer 16

Inductive reactance limits the amount of current flow in a ac cct

Question 17

What is capacitive reactance

Answer 17

Capacitive reactance is a property that stores energy in the electrostatic field and realease it back into the cct

Question 18

Apparent power letter?

Answer 18

S

Question 19

Other names for apparent power

Answer 19

Real, true or active power

Question 20

Series RLC
Current to inductive voltage relationship?

Answer 20

Current lags the inductive voltage drop by 90°

Question 21

Series RLC
Current relationship to capacitive reactance?

Answer 21

Current keads a capacitive voltage drop by 90°

Question 22

Parallel RLC
Capacitive lead or lag

Answer 22

Lead

Question 23

Voltage drop across a resistor in a delta is?

Answer 23

Root 3 times bigger than the voltage in a wye

Question 24

Wye or delta have higher current?

Answer 24

Delta will draw more current

Question 25

Heater and motor are connected in parallel if the power is decreased then the total current will?

Answer 25

Decrease

Question 26

Heater connected in parallel with a motor. If heater power is increased, then the overall PF will?

Answer 26

Decrease

Question 27

Series RLC the voltage and the capacitive reactance relationship with lead lag?

Answer 27

Current lead voltage by 90° so lags the current by 90°

Question 28

In a balanced 3 phase four wire system the line current is?

Answer 28

The same as phase current

Question 29

If a neutral breaks on a unbalanced 3 phase system? What happens to the phase voltage on the loads?

Answer 29

The phase voltage increases above normal on the least loaded phase