Points A and B have electric potentials of 332 V and 149

Step 1 of 2:-

a)

The electric potential at point A is 332 V.

The electric potential at point B is 149 V.

When the electron released from A, it has a kinetic energy of at point C.

When the electron released from B, it has a kinetic energy of at point C.

But .

From the conservation of energy,

-----------(1)

--------------(2)

And

-----------(3)

----------------(4)

Now, from equation (2) and (4),

So, by putting the above value in equation (1),

            .

So, the potential at point C will be 515 V.