Electric potential

Question 1

When dielectric is inserted, Capacitance?

Answer 1

increases

Question 2

Self energy of solid sphere outside

Answer 2

Q^2/8piepsr

Question 3

Self energy of solid sphere total

Answer 3

3Q^2/20piepsr

Question 4

Potential due to disc

Answer 4

sigma/2eps * (root(R^2 + x^2) - x)

Question 5

Potential at edge of disc

Answer 5

sigmaR/pieps

Question 6

Polarization

Answer 6

P = eps x E

Question 7

common potential and energy loss for same end joined

Answer 7

C1V1+C2V2/(C1+C2)

1/2 C1C2/(C1+C2) * (V1-V2)^2

Question 8

common potential and energy loss for diff end joined

Answer 8

C1V1-C2V2/(C1+C2)

1/2 C1C2/(C1+C2) * (V1+V2)^2

Question 9

Capacitance of isolated sphere

Answer 9

4piepsr

Question 10

capacitance of cylinder

Answer 10

2pieps l/ln(R2/R1)

Question 11

q induced

Answer 11

q(1 - 1/k)