AQA PHYSICS GCSE - ELECTRICITY QUESTIONS AND ANSWERS A+ GRADED

AQA PHYSICS GCSE - ELECTRICITY QUESTIONS AND
ANSWERS A+ GRADED

resistance (R=V/I)
opposition to a flow of electrical current (or the ratio of Pd to Current in a component.)
resistor graph
filament graph
diode graph
series circuit
-current is the same everywhere
-emf/voltage is shared
Rn=R1+R2+....
parallel circuit
-current is split
-emf/voltage is the same everywhere
- adding resistors in parallel decreases total resistance to less that smallest individual
value.
Electron
a subatomic particle that has a negative charge
Conductor
A material through which charges can easily flow
Insulator
a material through which charges cannot easily flow
Circuit
an electrical device that provides a path for electrical current to flow
Series circuit
circuit that has only one path for electric current to follow
Parallel circuit
a closed circuit in which the current divides into two or more paths before recombining
to complete the circuit
Charge (Q)
Fundamental property of matter that produces all electrical effects
Coulomb (C)
the unit for electrical charge.
Current (I)
the rate that electric charges move through a conductor
Amperes (A)
a unit of electric current
Ammeter
a meter that measures the flow of electrical current in amperes
Pd or Voltage (V)
the energy transferred per unit charge by an electrical component
Potential Difference (p.d.)