A charge of Q is fixed in space. A second charge of q was first placed at a distance r1 away from Q. Then it was moved along a straight line to a new position at a distance R away from its starting position. The final location of q is at a distance r2 from Q. 1)What is the change in the potential energy of charge q during this process

Explanation:

The electrostatic potential energy is given by the following formula

Now, we will apply this formula to both cases:

So, the change in the potential energy is

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

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