# What is the difference between electric potential energy and electric potential difference?

Electric potential energy is the potential energy stored when charges are out of equilibrium (like gravitational potential energy). Electric potential is the same, but per charge, U e q . An electric potential difference between two points is called voltage, V = U e 2 q − U e 1 q .
A.

### What is meant by electrical potential difference?

By definition, the electric potential difference is the difference in electric potential (V) between the final and the initial location when work is done upon a charge to change its potential energy.
• #### What is the difference between potential and potential difference?

Potential Difference. Potential difference , or voltage, is the difference in electric potential energy between two points. It is denoted by ∆V and has units of volts, or joules per Coulomb. Potential is the specific potential energy.
• #### What is the potential difference for kids?

Measuring Resistance. The symbol "V" is used to represent something called the potential difference. Potential difference is the amount of work done in moving a charge between two points, divided by the size of the charge. That's kind of complicated, though. You can think of potential as electrical height.
• #### What is the SI unit of potential difference?

The standard metric unit on electric potential difference is the volt, abbreviated V and named in honor of Alessandro Volta. One Volt is equivalent to one Joule per Coulomb.
B.

### What is the definition of electric potential?

An electric potential (also called the electric field potential, potential drop or the electrostatic 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.
• #### Can there be a negative potential energy?

It is also important to note that potential energy can be positive, zero or negative. For example, if the datum is defined as the top of a table, and the object is on the floor, that object has a negative potential energy since the height below the top of the table.
• #### Can you have a negative electric potential energy?

Note that if q is negative, its sigh should be used in the equation! Therefore, a system consisting of a negative and a positive point-like charge has a negative potential energy. A negative potential energy means that work must be done against the electric field in moving the charges apart!
• #### What is an equipotential line?

In this case the "altitude" is electric potential or voltage. Equipotential lines are always perpendicular to the electric field. In three dimensions, the lines form equipotential surfaces. Movement along an equipotential surface requires no work because such movement is always perpendicular to the electric field.
C.

### What is the difference between voltage and potential?

If the electric potential difference between two locations is 3 volts, then one coulomb of charge will gain 3 joules of potential energy when moved between those two locations. Because electric potential difference is expressed in units of volts, it is sometimes referred to as the voltage.
• #### What is the unit used to measure potential difference?

Potential difference (V) – is measured in volts (V). Potential difference is the work done per unit charge. A potential difference of 1 V means that 1 joule of work is done per coulomb of charge.
• #### What is the Ohm's law?

The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "resistance", R. Ohm's Law is given by: V = I R where V is the potential difference between two points which include a resistance R.
• #### What is the potential difference between two points?

One Volt is equivalent to one Joule per Coulomb. If the electric potential difference between two locations is 1 volt, then one Coulomb of charge will gain 1 joule of potential energy when moved between those two locations.

Updated: 17th October 2019