Nov 2020 UV Exam - Physics Definitions Flashcards
charge
One of the basic properties of the elementary particles of matter giving rise to all electric and magnetic forces and interactions
The direction of the electric field (at a point)
The direction that a positive test charge would move if placed at that point
Electrostatic Force
The force exerted by non-moving (static) charges on each other
Law of Conservation of Charge
The net charge of an isolated system remains constant.
Potential Difference
The work done per unit positive charge.
EMF
The total energy supplied per coulomb of charge by the cell.
Diode
An electronic component that allows current to flow in one direction in a circuit.
Ohm’s law
Current through a conductor is directly proportional to the potential difference across the conductor at constant temperature.
Kirchhoff’s Law of Voltage
Around any closed loop in circuit, the sum of the voltage drops is equal to the EMF.
Kirchhoff’s Law of Current
The sum of the current flowing into any point equals the sum of the current flowing out from the point.
Electrical Work
The work done on a charged particle by an electric field.
Vector Quantity
A physical quantity that has both magnitude and direction.
Scalar Quantity
A physical quantity that has magnitude only.
Position (x)
An object’s location relative to a reference point.
Frame of Reference
A reference point combined with a set of directions.
