If |V1⃗⃗⃗⃗ + V2⃗⃗⃗⃗| = |V1⃗⃗⃗⃗ − V2⃗⃗⃗⃗| and V2⃗⃗⃗⃗ is not equal to zero, then which of the following statement is true?- (a) V1⃗⃗⃗⃗ and V2⃗⃗⃗⃗ are parallel (b) V1⃗⃗⃗⃗ and V2⃗⃗ are equal in magnitude,

(c) V1⃗⃗⃗⃗ and V2 ⃗⃗⃗⃗ are perpendicular to each other, (d) none of these

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