Q. A series R-C circuit is connected to an alternating voltage source. Consider two situations :\n(a) When capacitor is air filled.\n(b) When capacitor is mica filled.\nCurrent through resistor is i and voltage across capacitor is V then :
A) $V_a = V_b$
B) $V_a < V_b$
C) $V_a > V_b$
D) $i_a > i_b$
Explanation
[Solution] Mica raises C and lowers $X_C$, so current rises and the capacitor's share of voltage falls: $V_a > V_b$. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.