Ch 21 sec 2 w 6 and 7 tr 2 Applications_of_Electric_Fields

Electric Potential (Voltage)

Electric potential energy per unit charge.

Electric Potential Difference

The work needed to move a positive test charge from one point to another divided by the magnitude of the test charge.

Volt (V)

Unit of electric potential difference, equivalent to joules per coulomb (J/C).

Equipotential

Positions where the electric potential difference is zero.

Capacitor

A device for storing electrical energy in an electric field.

Capacitance (C)

The constant that relates charge and potential difference, expressed in farads (F).

Joules (J)

The unit of work or energy in the International System of Units.

Electric Field (E)

A field around charged particles that exerts a force on other charged particles.

Positive Test Charge

A hypothetical charge used to measure electric potential and electric field.

Negative Plate

The plate in a capacitor that has a net negative charge.

Positive Plate

The plate in a capacitor that has a net positive charge.

Excess Electrons

Additional electrons present on an object when it is negatively charged.

Capacitance Formula

C = q/ΔV, where C is capacitance, q is charge, and ΔV is potential difference.

Electric Field (E)

A field around charged particles that exerts a force on other charged particles.

Electric Potential (Voltage)

Electric potential energy per unit charge.