Electromagnetism
LC Circuits
RLC Circuit
Power
RC Circuits
100
The voltage that the coil induces to oppose the action
What is back emf?
100
It is equal to 2 pi.f.L
What is XL
100
180 degrees
What is angle between VL and Vc? Or between XL and Xc?
100
It is volt amp
What is the unit of apparent power?
100
It is R x C
What is the time constant?
200
magnetomotive force.
What is mmf?
200
It is equal to 1/(2pi.f.C)
What is Xc?
200
It is the frequency at which XL=Xc
What is the resonance frequency?
200
It is the watt
What is the unit of active power?
200
After 1 time constant
How long does it to charge a cap to 63% of its final voltage?
300
Amp turn
What is the unit of mmf?
300
It is the difference between XL and Xc
What is the total impedance of L and C?
300
At this frequency, the impedance of the RLC series circuit is = R
What is the impedance of the RLC series circuit at resonance?
300
It is the volt amp reactive or var
What is the unit of reactive power?
300
It takes about 5 time constants
What is long does it take a cap to charge?
400
It is called Reluctance
What is magnetic resistance called?
400
in the coil or the capacitor.
In which component is the voltage and the current are out of phase?
400
Take the difference between XL and Xc, square it and add to R square, then take the square root of the answer.
How can you calculate Z of series RLC circuit?
400
It is the power in resistances.
What is active power?
400
Take the square root of R square + Xc square
how can you calculate Z?
500
Lenz's law
What law is used to determine the polarity of the induced emf?
500
fr= 1/(2π√LC)
What is resonance frequency formula?
500
It is the ration of R to Z
What is the power factor?
500
It is the power in capacitors and coils.
What is reactive power?
500
R/Z
What is the power factor?
M
e
n
u