Physics Grade 10 Final Definitions Flashcards
Current
The rate at which charge passes a point in a circuit is the measure of the electric current
One coulomb
The amount of charge that passes through any cross section of a conductor when a current of 1 ampere exists in the conductor for 1 second
Potential difference
Potential difference between two points is the amount of work done or energy transferred per unit charge that moves from a point of higher potential to a point of lower potential in a circuit.
Volt
The potential difference that exists across a conductor when one joule of work is done per one coulomb of charge transferred.
Ohm
The resistance is one ohm when a potential difference of 1 volt allows a current of 1 ampere to pass through it.
Principal of conservation of charge
The net charge in an isolated system remains constant during any physical process
Principal of quantisation of charge
Every charge in the universe is an integer multiple of charge carried by the elementary charge
Law of repulsion
Like charges repel each other
Law of attraction
Opposite charges attract
Principal of conservation in a mathematical sentence
Electrons lost = electrons gained = electrons transferred
Resistance
Potential difference applied across the ends divided by the current passing through it
What is needed for current to flow?
Potential difference and a closed circuit
Conventional current
Flow of positive charge from the positive to negative terminal
Magnetic field
The region in space in which a magnetic material will experience a magnetic force
Symbol - B
Unit of measurement - Tesla
Symbol for unit of measurement - T
Magnetic flux
The number of magnetic field lines passing through a given surface area, perpendicular to the plane of the surface area.
Symbol - φ (phi)
Unit of measurement - Weber
Symbol for unit of measurement - Wb
