Which statement about subatomic particles is not true?

a) protons and neutrons have almost the same mass.

b) protons and neutrons have he same charge.

c) unlike protons and electrons neutrons have no charge.

d) protons and electrons have opposite charges.

A) True. protons and neutrons have almost the same mass.

B) Not true. Booo !  protons and neutrons have the same charge.  

C) True.  unlike protons and electrons neutrons have no charge.  

D) True.  protons and electrons have opposite charges.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .