Electronics By... AOIFE!!! Flashcards
Diode?
Is a component that will allow the current to flow in one direction only
Forward biased?
If the positive end of the battery is connected to the positive end of the diode, the diode is said to be forward biased and current can flow.
Reverse biased?
If the positive end of the battery is connected to the negative end of the diode it is said to be reverse biased and no electricity can flow.
A diode can be used to…
Change alternating current into direct current
Electronic devices such as radios, tape recorders and calculators
Need low voltage direct current to work
Light emitting diode…
Is a diode that gives out light when a current flows though it
Current will only flow when LED is
Forward biased
LED’s use only tiny currents so
A resistor must be connected in series with it.
LED’s are useful as they are…
Cheap, reliable and long lasting and use far less current than other light bulbs
A light dependant resistor
Is a resistor whose resistance depends on light
When light falls on a LDR
It’s resistance decreases, this low resistance will allow a current to flow through the circuit
Electronics?
Is the careful and exact control of tiny amounts of electric current.
