Question

In a series R-C circuit connected to an alternating voltage source. It
is observed that the power factor for the circuit is and value of the
resistance is known to be 6 ohm. Then​

Answer 1

Answer:

plz post the complete ques

Answer 2

For series C-R circuit, the impedance Z=R2+XC2   where XC=ωCj and current I=V/Z

When the capacitor is filled by mica, the capacitance will be increased. If C increases, XC decreases,  so the current will increase and 

hence voltage across resistance increases and voltage across capacitor decreases. thus, Va>Vb