Junior Cert Science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What do you call the careful and exact control of very small currents | Electronics
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| What do you call a component that allows current to flow in one direction only | Diode
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| 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
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| 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
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| True or false. A diode can be used to change alternating current into direct current | True
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| What do you call a diode that gives out light when current flows through it | Light Emitting Diode (LED)
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| Where would you find LEDs | indicator lights on many electronic devices
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| What are the advantages of LEDs | Use less current, cheap, reliable and long lasting
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| What do you call a resistor whose resistance depends on light | Light Dependent Resistor (LDR)
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| Where would you find LDRs | Controls street lighting
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
gcu science
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