Alternating CurrentMedium
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.
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