Electric Potential - (Physics 3)

Electrical potential energy

Potential energy associated with a charge due to its position in an electric field

Electrical potential energy is a component or

Mechanical energy

Mechanical energy conservation

As long as friction and radiation are not present

Tesla coil

As the charges in the sparks move, the electrical potential energy decreases, just as gravitational potential energy decreases as an object falls

Negative sign indication on q

Electrical potential energy will increase if the charge is negative and decrease if the charge is positive

Physical importance in electrical potential energy

The difference in electrical potential energy

Electrical potential energy in a uniform electric field equation

PE = -q(E)(d)

When electrical potential energy is calculated,

‘d’ is the magnitude of the displacement’s component in the direction of the electric field

Electric potential

The work that must be performed against electric forces to move a charge from a reference point to the point in question, divided by the charge

Electric potential at a point

Independent of the charge at that point

Potential difference

The work that must be performed against electric forces to move a charge between the two points in question, divided by the charge

Potential difference equation

△V = △PE/q

SI unit for potential difference

V (volt)

Potential Difference in a uniform electric field equation

△V = -Ed

‘d’ is the displacement parallel to the field and

That motion perpendicular to the field does not change the electrical potential energy

An electric potential exists at some point in an electric field,

Regardless of whether there is a charge at that point

Potential difference between a point at infinity and a point near a point charge equation

△V = kc(q/r)

Superposition principle

The electric potential at a point near two or more charges applied by this rule

Terminal

Constant potential differences between two locations inside a battery

Battery

An energy-storage device that provides a constant potential differences between two locations called terminals inside the battery