electric circuits Flashcards
what is the definition of electical current
electric current is the rate of flow of charge
what is the equation that links charge current and time
Q= l x t
what is the unit for charge flow
coloumbs, C
what is the unit for current
amps, A
what is the unit for time
seconds, S
what is the equation that links potential difference, current and resistance
V= I x R
What is the unit for potential difference
volts, V
what is the unit for resistance
ohms ♎️
what is the difference between a series and a paralel circuit
a series has only one path for the current to flow, a parallel has more than one
what does ohms law say
the current through an ohmic conductor is directly proportional to the potential difference across the resistor
what happens to the resistance of filament lamp as the temperature increases
as the temperature increases the resistance of a filament lanp also increases
what happens to the resistance of a thermistor as it increases in temperature
the resistance decreases as the temperature increases
what happens to the resistance of a LDR as the light intesity increases
the resistance decreases as the light intesity increases
in what diode can the current flow through a diode
current can inly flow one way through a diode
name an application of an LDR
in sensing circuits such as lights turning off when dark
