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41 Cards in this Set

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  • Back
Acceleration
The rate at which an object increases in speed
Alternating current (a.c.)
An electric current which changes direction of flow continuously
Attraction
The drawing together of two materials with different types of charges
Charged
Having an overall positive or negative electric charge
Circuit breaker
A safety device which breaks an electric circuit if it is overloaded
Current
The rate of flow of electric charge. Measured in Amps
Diode
An electrical device that allows current to flow in one direction
Direct current (d.c.)
An electric current that flows in one direction
Distance
The space between two points
Electron
Negatively charged sub-atomic particle
Electrostatic
Producing or caused by static electricity
Energy
The ability to do work; measured in Joules
Force
A push or pull acting on an object
Friction
The force that resists movement between two surfaces
Fuse
A thin piece of wire that melts to break a circuit when it is overloaded
Ion
A charged particle formed by the gain or loss of an electron by an atom.
Isotopes
Atoms of the same element with different no. of neutrons
Joule
A measure of the energy or work done
Kinetic energy
A measure of the state of motion of an object
Mass
The quantity of matter in an object
Momentum
The energy possessed by an object due to movement
Newton
A measure of force
Neutron
A neutrally charge sub-atomic particle
Nuclear Fission
The splitting of atomic nuclei
Nuclear Fusion
The joining together of atomic nuclei
Parallel circuit
A circuit where there is more than one path for the current to take
Potential difference (p.d.)
The difference in electrical charge between two charged points
Proton
A positively charged sub-atomic particle
Repulsion
The pushing away of two materials with the same type of charge.
Resistance
Opposition to the flow of an electric current
Resistor
An electrical device that resists the flow of electric current
Series circuit
A circuit where there is only one path for electric current
Speed
The rate at which an object moves
Static electricity
Electricity caused by rubbing that causes the loss or gain of electrons
Terminal velocity
The maximum velocity reached by a falling object (forces are balanced)
Thermistor
A component whose resistance varies with temperature.
Transfer
To move energy from one place to another
Transform
To change energy from one form into another
Velocity
The speed an object moves in a particular direction
Weight
The gravitational force exerted on an object
Work
The energy transfer that occurs when a force causes an object to move.