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Electronics

Junior Cert Science

QuestionAnswer
What do you call the careful and exact control of very small currents Electronics
What do you call a component that allows current to flow in one direction only Diode
When the positive terminal of a battery is connected to the positive end of a diode, it allows current to flow, what direction is this said to be? Forward biased
When the positive terminal of a battery is connected to the negative end of a diode, it does not allow current to flow, what direction is this said to be? Reverse biased
True or false. A diode can be used to change alternating current into direct current True
What do you call a diode that gives out light when current flows through it Light Emitting Diode (LED)
Where would you find LEDs indicator lights on many electronic devices
What are the advantages of LEDs Use less current, cheap, reliable and long lasting
What do you call a resistor whose resistance depends on light Light Dependent Resistor (LDR)
Where would you find LDRs Controls street lighting
Created by: Teacher Amrein