4.4-4.6 Flashcards
what is teh equation for resistance
resistance=potential differnce/current
what is a light emitting diode
a diode that emits light when a current passes through it in the forward direction
where are thermisotrs and light dependent resisors used in
sensor circuits
how does the resistance in a thermistor change
its resistance decreases if the temperature increases
how does the resistance of an LDR change
the resistance decreases if the light intensity increases
what is the rule for current in a series circuit and how do you work it out
the same current passes through each component
the sum of the potential differnce in each cell
how do you work out resistance of a series circuit
add up all the total resistances of each circuit
why does adding more resisitors increase the amount of resistance in series
this is because the total potential difference is shaired between more resistors, and as a result the potential differce across them is less than before . The current through the resistors is there for less then before making the resistance higher
what is the rule for current in parallel
its the sum of each ammeter
what is the rule for potential difference in parallel
its the same across each component
