what is an electrical potential? write it's formula and unit.
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The electric potential—that is, the work W done in moving the positive charge through a distance d—is W = F′d = −qEd. If an electric field is defined as the force per unit charge, then by analogy an electric potential can be thought of as the potential energy per unit charge. Its SI unit is j/c=Volts.
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The electric potential is the amount of work energy needed to move a unit of electric charge from a reference point to the specific point in an electric field with negligible acceleration of the test charge to avoid producing kinetic energy or radiation by test charge.
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