1. \(E_A>E_B>E_C\)
2. \(E_A=E_B=E_C\)
3. \(E_A=E_C>E_B\)
4. \(E_A=E_C<E_B\)

A point charge is brought in an electric field. The electric field at a nearby point,

A proton and an electron are placed in a uniform electric field.

Choose the correct option.

A charge Q is uniformly distributed over a large plastic plate. The electric field at a point P close to the centre of the plate is 10 V/m^–1. If the plastic plate is replaced by a copper plate of the same geometrical dimensions and carrying the same charge Q, the electric field at the point P will become

1.   zero

2.   5 V m^–1 

3.   10 V m^–1

4  20 V m^–1