Question

A parallel plate capacitor is fully charged through a 9V battery. It has an area of A=10 cm². The plates are separated by a distance of d=0.1cm and the space between the plates is initially filled with air. We then remove the battery and subsequently insert a material with a dielectric constant of K=3 in between the plates. Upon this insertion, the potential across the plates: Select the correct answer is increased by a factor of 9 Ostays the same O is decreased by a factor of 3 is decreased by a factor of 9 is increased by a factor of 3

Answer 1

C = EA a A = Aren, de separation Initial voltage = v To Chouse 9 - ev final capacitance (4) (6 = KEA =3&A d d 4 = 3C So Potential decreased by suppose initial capacitance 3 of final chargee Of = Vf q = 3c/f os charge is conseweld Qi - Of = 3 C/f = CV so = V 3 factor o