The formula for finding the force on a +q charge is F = qE, where F is the force, q is the charge, and E is the electric field.
The direction of the force on a +q charge is determined by the direction of the electric field. The force will be in the same direction as the electric field if the charge is positive, and in the opposite direction if the charge is negative.
No, the force on a +q charge cannot be negative. Since the charge is positive, the force will always be in the same direction as the electric field, which is defined as being positive.
The force on a +q charge is inversely proportional to the square of the distance between charges. This means that as the distance between charges increases, the force decreases, and vice versa.
To calculate the magnitude of the force on a +q charge, you can use the formula F = qE, where q is the charge and E is the electric field. Alternatively, you can also use Coulomb's Law, which states that the magnitude of the force is equal to kqQ/r^2, where k is the Coulomb's constant, q and Q are the charges, and r is the distance between them.