1)Two 3.00-microC charges are at the ends of a meter stick. Find the electrical

Question

1)Two 3.00-microC charges are at the ends of a meter stick.  Find the electrical potential for the center of the meter stick

2)Doubling the voltage across a given capacitor causes the energy stored in that capacitor to    

      quadruple.       double.       reduce to one half.       reduce to one fourth. 3)A square is 1.0 m on a side.  Charges of +4.0 microC are placed in two diagonally opposite corners.  In the other two corners are placed charges of +3.0 microC and -3.0 microC.  What is the absolute potential in the square's center?           1.0

Explanation / Answer

A) potential energy is U= k*q1*q2/r=9*10^9*3*10^-6*3*10^-6/0.5=162*10^-3 J....

B) U=(1/2)*C*V^2....

doubling the voltage energy stored U increases by 4 times.......quadruple.....

C) 1.0

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