Two identical isolated parallel-plate capacitors initially hold the same charge at…
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
Two identical isolated parallel-plate capacitors initially hold the same charge Q at potential difference V0 while filled with dielectric slabs. Capacitor X contains a slab with dielectric constant κ1=2, and capacitor Y contains a slab with dielectric constant κ2=4. In separate experiments, each dielectric is slowly and completely removed. What is the ratio WY/WX of the external work required to remove the dielectric from capacitor Y to that required for capacitor X?
(a) 1
(b) 3
(c) 23
(d) 2