Studied by 1 person
Looks like no one added any tags here yet for you.
Charge=
current x time
like charges
Different charges
REPEL
ATTRACT
Radial field
As you move away from the sphere the feild gets weaker
negitive sphere, - out + in
plus sphere, -in +out
Charge is measured in
Coulombs
Current is the
measure of the movement of charge and is measured in amps (coulombs per second)
Ametre
measures how much charge is moving around a current
Voltmetre
measure of p.d this is the measure of energy a cells gives to the charge§
Resistor
Resistance is a measure of hoe hard it is for current to flow through a component , measured in ohms.
V=
IR
IV Graph filament bulb
Diode
Light dependant resistor
As the light intensity increases the resistance falls
IV experiment
Thermosistors
As temprature increases resistance falls
Ohmic resistor
LED graph
Series more bulbs=
more resistance
Parallel more bulbs =
more current and and less resistance
Resistance in series and NO. of bulbs
Not straight because bulbs are less bright and cold.
Resistance in parallel and NO. of bulbs
Series
resisatance can be added, current same everywhere, mpotential differences add to supply.
Parallel
Potential difference = same for all resistors, total current = all current added together.
Parallel Rtotal =
V/I total.
Using a LDR to measure light intensity
V =
E/Q E=energy Q=Charge
E=
QV
P=
E/T
I=
Q/T
Power=
I² x R
Note
Flashcard