AC circuits Flashcards
1
Q
Compare d.c. and a.c.
A
Electric charge flows 1 direction in d.c., but periodically reverses direction in a.c.
2
Q
Define frequency
A
Frequency is the number of repetitions of a.c. per unit time
2
Q
Define root mean-square value
A
r.m.s. is the value of the steady d.c. that dissipates heat energy in the resistor at the same average rate as that is dissipated by the a.c.
2
Q
What is angular frequency equal to
A
2pi/T
3
Q
Define ideal diode
A
An ideal diode is one where the direction of the arrow indicates the direction of conventional current that is allowed to pass through it
