Aparallel plate capacitor without a dielectric is charged up so that it stores potential energy uo, and it is then disconnected so that its charge remains the same. a dielectric with constant k = 2 is then inserted between the plates. what is the new potential energy stored in the capacitor with the dielectric? a) 400 b) 200 c) u. d) 14u

Explanation:

Q = Amount of charge stored by parallel plate capacitor

C₀ = Capacitance of the capacitor

U₀ = Amount of electric potential energy stored

Amount of electric potential energy stored is given as

k = dielectric constant of dielectric = 2

New capacitance of the capacitor is given as

C = k C₀

New amount of electric potential energy stored is given as

more than, less

less than, more

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2