Frequent question: How is electric potential related to work?

Is electric potential the same as work?

The potential at a point can be calculated as the work done by the field in moving a unit positive charge from that point to the reference point – infinity. You can also calculate the potential as the work done by the external force in moving a unit positive charge from infinity to that point without acceleration.

How does the electric potential and work done are equal?

Electric potential: It is the amount of electrical potential energy that a unitary point electric charge would have if located at any point in space, and is equal to Work done by an electric field in carrying a unit positive charge from infinity to that point.

Why is electric potential important?

The discussion of electric potential is important because we are always looking for convenient sources of energy. Since any two point charges exert a force of attraction or repulsion on each other, if one charge moves in the field of the other a distance dr under an average force F, the work done is equal to Fdr.

How is electric potential used?

The electric force F exerted by the field on the positive charge is F = qE; to move the charge from plate A to plate B, an equal and opposite force (F′ = −qE) must then be applied. The work W done in moving the positive charge through a distance d is W = F′d = −qEd. The electric potential is another useful field.

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What is potential difference between A and B?

According to Kirchhoff’s law for any closed system, the total voltage drop between any two points is equal to the sum of all the individual potential drops between the same two points. The potential difference between points A and B is 48V .

What is electric potential and its unit?

It is defined as, An electric potential is the amount of work needed to move a unit positive charge from a reference point to a specific point inside the field without producing any acceleration. Its SI unit is j/c=Volts.