The general function for the electric field of a point charge is given by the equation E = k*q/r^2, where E is the electric field, k is the Coulomb's constant (9x10^9 Nm^2/C^2), q is the charge of the point charge, and r is the distance from the point charge.
The direction of the electric field for a point charge is always radial, meaning it points directly away from or towards the point charge, depending on its positive or negative charge. The direction can be determined using the right hand rule, where the fingers point in the direction of the electric field and the thumb points in the direction of the force on a positive test charge.
No, the general function for the electric field of a point charge can only be used for a single point charge. For multiple point charges, the electric field is calculated by summing the individual electric fields at a given point using vector addition.
The electric field strength is inversely proportional to the square of the distance from the point charge. This means that as the distance increases, the strength of the electric field decreases.
Yes, the general function for the electric field of a point charge is valid for both positive and negative charges. The only difference is the direction of the electric field, which is towards the point charge for negative charges and away from the point charge for positive charges.