Did you mean "The strength of electric field is positive or negative"?
Anyway, there is your answer..
The strength of an electric field E at any point is defined as the electric force F exerted per unit positive electric charge q at that point, or E = F/q.You can say that it is positive.
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The electric field is a vector quantity that can have both positive and negative values. The sign indicates the direction of the force that a positive test charge would experience if placed in the field: positive for a repulsive force and negative for an attractive force.
For a positive charge, it points in the outward directios. For a negative, it points towards the charge.
The electric field points from positive to negative.
In a given system, the electric field direction changes from positive to negative when the source of the electric field changes its charge from positive to negative.
The strength of the electric field between positive and negative charges is determined by the magnitude of the charges and the distance between them. The direction of the electric field is from the positive charge to the negative charge.
Electric field lines go from positive charges to negative charges.
A negative point charge will be attracted towards a positive point charge in an electric field.