OCR PHYSICS P1-4 Key Words

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  • Created by: SamuelTye
  • Created on: 12-07-17 18:17
Electron
A negatively charged particle that orbits the nucleus of an atom
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Density
The mass of unit volume of a substance
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Melting
Process of a solid changing to a liquid
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Freezing
Process of a liquid changing to a solid
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Evaporation
Process of a liquid changing to a gas
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Condensation
Process of a gas changing to a liquid
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Sublimation
Process of a solid changing to a gas
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Specific Heat Capacity
The amount of energy needed to change the temperature of a substance by 1 degree
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Specific Latent Heat
The amount of energy required to change the state of 1Kg of a substance
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pressure
The force applied to a surface
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Scaler
A measurement that only has a magnitude (Eg: Speed)
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Vector
A measurement that has a magnitude & direction (Eg; Velocity)
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Speed
How fast something is moving for a particular distance in a particular time
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Acceleration
When the velocity of an object increases
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Velocity
Speed with a direction
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Force
A push or pull that is applied to an object
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Contact Forces
A force that requires contact in order to be felt
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Non-Contact Force
A force that doesn't require contact to be felt
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Inertia
Objects that are difficult to move & stop (Eg; Large boat)
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Momentum
The quantity of motion an object has
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Work Done
When a force causes a movement of an object
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Power
The rate of doing work/transferring energy
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Mass
Amount of substance present in an object
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Weight
The force acting on the object due to gravity
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Moment
A turning effect acting around a pivot
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Lever
A machine that reduces the force needed to lift an object
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Gears
A toothed wheel that works with other wheels to alter the relation between the speed of a driving mechanism (Eg: Engine) and the speed of the driven parts (Eg: Wheels)
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Static charge
A build up of electrons
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Electric Field
An area of space where a force acts on a charged particle
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Current
The rate of flow of electric charge
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Potential Difference (Voltage)
Energy transferred per unit charge
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Resistance
The measure of which a conductor opposes the electric current
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Resistor
A
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Thermistor
A resistor that changes when temperature changes
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LDR (Light Dependant Resistor)
A resistor that changes when light intensity changes
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Diode
Only allows current to flow in one direction
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I-V Graph
Shows the relationship between Current (I) & Voltage (V)
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Permanent Magnet
Produces its own magnetic field
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Induced Magnet
Material that becomes magnetic when placed in a magnetic field
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Bar magnet
A rectangular permanent magnet that has a South & North pole
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Magnetic Field
A region around a magnetic material where the force of magnetism acts
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Solenoid
A coil of wire
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Magnetic Flux Density
The strength of a magnetic field
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Electric Motor
A mechanism that converts electrical energy into mechanical energy
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Generator
A mechanism that converts mechanical energy into electrical energy
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Transformer
A mechanism that changes the voltage of electricity
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Step-up transformer
Increases the voltage from the primary coil to the secondary coil
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Step-down transformer
Decreases the voltage from the primary coil to the secondary coil
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Other cards in this set

Card 2

Front

The mass of unit volume of a substance

Back

Density

Card 3

Front

Process of a solid changing to a liquid

Back

Preview of the back of card 3

Card 4

Front

Process of a liquid changing to a solid

Back

Preview of the back of card 4

Card 5

Front

Process of a liquid changing to a gas

Back

Preview of the back of card 5
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