How does the strong nuclear force hold the nucleus of an atom together?

a. it overcomes the electrical force of repulsion between protons in the nucleus.
b. it overcomes the electrical force of attraction between protons in the nucleus.
c. it overcomes the electrical force of repulsion between electrons in the nucleus.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e