Chapter 18 Alternating Current Flashcards
(3 cards)
1
Q
Root mean square value of AC
A
The value of steady current that will dissipate heat at the same average rate as the alternating current in a resistive load
Irms = I0/√2
2
Q
Power loss in transformers
A
Laminated core: to reduce energy loss due to heat by reducing any currents in the core.
Soft iron core: channel magnetic field from primary coil to secondary coil to increase flux linkage.
Thick wires for coils: Reduce power loss through resistance of coils
3
Q
Ideal transformer
A
100% efficient and has no power losses
IpVp=IsVs
