Question

Assume we are given an electric field set up by an unknown charge distribution. Uo is the amount of work needed to bring a point charge of charge qo in from infinity to a point P. If the charge qo is returned to infinity, how much work would it take to bring a new charge of q0 from infinity to point P? 1) U0 / 4 2) 8 U0 3) The correct answer is not given. 4) 2 U0 5) 4 U0 6) More information is needed. 7) U0 8) U0 / 8 9) 0 10) U0 / 2

Answer 1

Answer:

electric potential

Explanation:

The electric potential at a point P  is  the work done required to move a unit charge from infinity to point P. The work done to bring a charge q from infinity to P would be  Q/(4πεr)

For example:

Determine the value of the the electric potential (assuming the potential is zero at infinite distance), and the energy needed to bring a +1.0 μC charge to coordinates (2,0) from infinity

V =  kq/r

V = (9.0  × 10^9 Nm2/C2)(1.0  × 10^−6 C)/(2.0 m)

V = 4500 V