Electricity

measure of current that flowed within a period of time

what is the unit for charge

what is the formula linking charge, current and time

what is the charge of an electron

how can we find the number of electrons that have flown past a point

does conventional current flow from positive to negative or negative to positive

how does electron flow differ to conventional current

what is Kirchoff's first law

what is meant by potential difference

what formula links energy, power and time

which formula links charge, energy and voltage

how does the temperature affect the resistance of wires and resistance

why does increasing the temperature of a wire increase its resistance

the current through a conductor is directly proportional to the potential difference and inversely proportional to the resistance

what does a diode do

what factors affect the resistance of a wire at constant temperature

how does resistivity of a metal vary with temperature

what is the resistivity of a superconductor below the critical temperature

what happens to the resistance of a wire as the length is increased

what happens to the resistance of a wire as the cross-sectional area is increased but all other factors are kept the same

the average velocity of charge carriers moving through a material due to an electric field

do conductors or insulators have the highest number of charge carriers

do semiconductors or insulators have the highest amount of charge carriers

give an example of a material with a high number of charge carriers

give the number of charge carriers for the perfect insulator

a circuit that has two or more resistors in series with a power supply

a potential divider has two resistors in series. If the output voltage is half the supply voltage, the resistors must be

what are some uses of a variable divider

what is the energy supplied by a power supply per coulomb of charge

what is a power supplies internal resistance

the voltage measured across the terminals of a source

what is meant by the difference between the electromotive force of a power supply and the terminal potential

what happens to the resistance of an LDR when placed in bright light

how can the resistance of a thermistor be increased