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42 Cards in this Set

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  • Back


The Rate of flow of Charge

1 coulomb

Amount of charge that passes in 1 second when current is 1 ampere.

Potential Difference

Work done per unit of charge

Mean Drift Velocity

Average velocity of the charge carriers


Property of a component that regulates the electric current through it.

3 Things that affect resistance




how does length affect the resistance of a wire?

The longer the wire, the more difficult it is to make a current flow through it.

How does area affect resistance?

The bigger the area, the lower theresistance


Ratio of the product of resistance and cross sectional area of a component to its length

Ohms Law

Current is directly proportional to the potential difference provided temperature stays constant.

Name the component

Name the component

Metallic conductor

Name the component

Name the component

Filament Lamp


Resistor with a resistance that depends on temperature.

Negative Coefficient Thermistor

Resistance decreases as temperature increases.

Resistance of LDR

the greater the light intensity the lower, the lower the resistance.


Only let current flow in one direction (forward bias). resistance is very high in the reverse bias.

Name the component

Name the component



Rate of transfer of energy

Kilo-watt hour

3,600,000 Joules


Total work done by a battery on each coulomb of charge

Internal resistance

Resistance to an electric current of the materials inside.

Kirchoff's first law

Total current entering a junction is equal to the total current leaving it.

Kirchoff's second law

Total emf around a series circuit is equal to the sum of the p.d's across each component.

Potential divider

Circuit using two resistors in series to split or divide up the p.d in proportion to the resistance of the components.


A variable resistor

What is the photoelectric effect?
Emission of electrons from the surface of a material when electromagnetic radiation is incident on it.


kinetic energy gained by an electron when it is accelerated through a potential difference of 1 volt.
Threshold frequency
minimum frequency of radiation to ionise an electron from a metal surface.
Small discrete unit of energy.
quantum associated with electromagnetic energy
explain relation between intensity and photoelectron emission.
number of photoelectrons emitted is directly proportional to the intensity of the radiation. provided its frequency is equal to or above the threshold frequency of the metal.
wave particle duality
The theory that all objects can exhibit wave and particle properties.

De Broglie's wavelength

Equation expressing the wavelength of a particle as a ratio of Planck's constant and particle momentum

work function

minimum energy required to release an electron from its surface, overcoming the electrostatic attraction between the electron and the positive metal ion.
the turning effect of a force
the principle of moments
for an object to be in equilibrium, the sum of the clockwise moments must be equal to the sum of the anti-clockwise moments.


the turning effect produced by a couple

force per unit area

Archimedes' priniciple

when a body is completely or partially submerged in fluid. it experiences an upthrust equal to the weight of the object.

what causes upthrust?
caused by the top and bottom of a body being at different depths.
work done per second

mass per unit volume