Alternating CurrentHard
Question
If we decrease the frequency of the applied A.C. with a purely capacitive load, do (1) the amplitude of Vc and (2) amplitude of Ic increase, decrease of remain the same.
Options
A.(1) increase (2) same
B.(1) same (2) increase
C.(1) same (2)decrease
D.(1) decrease(2) same
Solution
Xc = 
and ic = 
With decrease in frequency, Xc increases and hence ic decreases.
and ic = With decrease in frequency, Xc increases and hence ic decreases.
Create a free account to view solution
View Solution FreeMore Alternating Current Questions
In a series resonant R-L-C circuit, if L is increased by 25% and C is decreased by 20%, then the resonant frequency will...A resonant A.C. circuit contains a capacitor of capacitance 10−6 F and an inductor of 10−4 H. The frequency ...200 Ω resistance and 1H inductance are connected in series with an A.C. circuit. The frequency of the source is Hz....In which of the following case power factor will be negligible :-...The average power delivered to a series AC circuit is given by (symbols have their usual meaning) :...