Two parallel plates that are initially uncharged are separated by 1.2 mm. What charge must be transferred from one plate to the

Question

2 years ago

5

other if 11.0 kJ of energy is to be stored in the plates? The area of each plate is 19.0 mm2.

1 answer:

Gnoma [55] · Answer 1 · 2022-09-06T23:32:45+03:00

Answer: 55.52 *10^-6 C= 55.52 μC

Explanation: In order to solve this question we have to take into account the following expressions:

potential energy stired in a capacitor is given by:

U=Q^2/(2*C) where Q and C are the charge and capacitance of the capacitor.

then we have:

Q^2= 2*C*U=

C=εo*A/d where A and d are the area and separation of the parallel plates capacitor

Q^2=2*εo*A*U/d=2*8.85*10^-12*1.9*10^-5*11*10^3/(1.2*10^-3)=

=55.52 *10^-6C