11. 12. A parallel plate square capacitor with sides 10 cm in length are separated by a 3.0 cm gap. The capacitor is connected to a 9.0 V power supply. A dielectric, with dielectric constant a = 3.0 is inserted between the plates while the capacitor remains connected to the power supply. What is the magnitude of electric eld between the plates due solely to the polarization of the dielectric? 2Q Q 3Q 4Q (1) eoA (2) eoA (3) eoA (4) 0 (5) eoA Two copper spheres, A and B, have initial charge 10 ,uC and 5.0 [LC respectively and radii TA = 2.0 cm and r3 = 3.0 cm. The spheres are connected by a conducting wire allowing charge to transfer before coming to equilibrium. How many electrons transfer from sphere A to sphere B? (1) 2.5 x 1013 (2) 5.6 x 1013 (3) 1.9 x 1013 (4) 0.63 x 1013 (5) 1.6 x 1013