ELECTRICITY GCSE AQA QUESTIONS AND ANSWERS A+ GRADED

ELECTRICITY GCSE AQA QUESTIONS AND ANSWERS
A+ GRADED

Electric Field
The field around charged particles that exerts a non-contact force on other charged
particles.
Cell
Pushes electrons around a complete cicuit
Battery
Two or more cells
Lamp
Emits light when current passes through it
Diode
A device that permits current to flow through it in only one direction.
Light-emitting Diode (LED)
combines the propertied of a diode and a lamp
Ammeter
A device used to measure current in a circuit
Fixed Resistor
limits the current in a circuit
Variable Resistor
Allows current to be varied
Fuse
A safety device with a thin metal strip that will melt if too much current passes through a
circuit
Voltmeter
A device used to measure voltage, or electrical potential energy difference
Series
A circuit in which all parts are connected end to end to provide a single path of current.
Potential Difference
the difference of electrical potential between two points.
The work done by each Coulomb of charge
Charge Equation
Energy Transferred ÷ Potential Difference = E÷V
Unit of Current
ampere, amps
Unit of Charge
Coulomb, C
Unit of Potential Difference
Volts
Resistance Equation
Voltage/current
Ohm's Law
the current in a circuit equals the voltage difference divided by the resistance