1.) Consider a parallel plate capacitor with plates of area1.04 m 2 whose plates
ID: 1763001 • Letter: 1
Question
1.) Consider a parallel plate capacitor with plates of area1.04 m2whose plates are 1.30 cm apart. Thegap between the plates is filled with air (assume thatair is unity) and thepositive plate has a charge of 11.4 nC on it while the negative plate has anegative charge of equal magnitude on it.
The capacitor has its plate-spacing reduced to 1.01 mm, and the plates are connected to a1.55 V battery.
The capacitor is disconnected from the battery and the platesare returned to their initial spacing.
The space between the plates is now filled with a fluid with adielectric constant of 4.43.
d) What is the voltage across the capacitor?
4 V
The area of overlap between the capacitor plates is increased to2.31 m2.
f) What is the voltage across the capacitor?
6 V
Explanation / Answer
b) Q = CV =(oA / d) * V = ( 8.9 x10-12 * 1.04 / 0.00101 ) * 1.55 = 14.20nC c) V =Qd /Ao = 14.20 x10-9 * 0.013 / 1.04*8.9x10-12 = 19.94 V
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.