Which of the following statements about paralle... - WAEC Physics 2018 Question
Which of the following statements about parallel plate capacitors is/are correct?
I. Capacitance of the capacitor is inversely proportional to the distance between the plates
II. Capacitors can filter a.c signals from d.c
III. Capacitors can store charges
A
I only
B
I and II only
C
II and III only
D
I, II and III
correct option: c
Capacitors pass AC but block DC signals (when charged up to the applied DC voltage). They are often used to
- separate the AC and DC components of a signal
- store energy
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