The formula for the electric field created by two charges is given by:
E = k * (q1 * q2) / r^2, where E is the electric field, k is the Coulomb's constant, q1 and q2 are the magnitudes of the two charges, and r is the distance between them.
The direction of the electric field is always radial, pointing away from the positive charge and towards the negative charge. If the two charges have the same sign, the electric field will be repulsive and if they have opposite signs, the electric field will be attractive.
Yes, the magnitude of the electric field is inversely proportional to the square of the distance between the two charges. As the distance increases, the electric field strength decreases.
Yes, if the two charges have equal magnitudes and are placed at equal distances from a point, the electric field created by them will cancel each other out. This point is called the neutral point.
The electric field at a point due to multiple charges can be calculated by vector addition. The electric field at that point will be the sum of the individual electric fields created by each charge.