Formulas

Question 1

What is the formula for finding ‘stored energy’ in a DC Capacitive Circuit?

Answer 1

W=0.5•C•V^2

Question 2

What is the formula to find Tau in a capacitive circuit?

Answer 2

T=R•C

Question 3

What is the formula to find the voltage of an individual capacitor?

Answer 3

Vcap=(1-e^x-1)•Vsource

Question 4

What is the formula to find current of a Tau in a series circuit?

Answer 4

Vr/Rr

Voltage across the resistor divided by resistance across the resistor will give you Itotal

Question 5

What is the formula to find total charge in a capacitive circuit?

Answer 5

Qtotal=CtotalVtotal

Question 6

The strength of an electromagnet is proportional to what

Answer 6

Ampere-turns

Current • Turns of wire

Question 7

Frequency

Answer 7

f=1/p

Question 8

Magnetic Flux

Answer 8

Wb=V•p

Question 9

How do you find a time constant in an inductive circuit

Answer 9

T=L/R

Question 10

How do you find induced voltage

Answer 10

E=-L•delta I/delta t

Question 11

Time to complete one waveform

Answer 11

P=1/f

Question 12

Total inductance of a series circuit

Answer 12

L total = L1 + L2 + L3

Question 13

Average AC voltage

Answer 13

Eav=RMS•0.9

Question 14

Frequency in generators

Answer 14

F=P•N/120

Question 15

ERMS

Answer 15

Ep•0.707

Question 16

IRMS

Answer 16

Ip•0.707

Question 17

PRMS

Answer 17

Pp•0.5

Question 18

Effective

Answer 18

Ep•0.707

Question 19

Average (AC)

Answer 19

RMS•0.9

Question 20

Instant V

Answer 20

Ep•sine

Question 21

Instant I

Answer 21

Ip•sine

Question 22

Sine wave power

Answer 22

ERMS•IRMS

Question 23

Peak power

Answer 23

E^2/P

Question 24

Power

Answer 24

I^2 or E^2/R

Question 25

Which law is this used for?

E=Blv

Answer 25

Faradays law: the electromagnetic force is directly proportional to the magnetic flux density