TOPIC 18: ALTERNATING CURRENT

Question 1

rms value of an ac

Answer 1

rms value of an alternating current is the value of a steady direct current that will dissipate thermal energy at the same average rate as the a.c. in a given resistor

Question 2

Source of power loss for transformers

Answer 2

1. Joule heating of wires in pri and sec coil
2. Eddy currents in iron core
3. Flux leakage
4. Hysteresis loss

Question 3

Will fuse break if the peak ac current exceeds the fuse rating?

Answer 3

No! Only if rms current exceed then fuse will break