Creating a Phone Charger

If a circuit is connected and electricity is flowing through it, is the circuit open or closed?
Open
Closed
What will happen to the power source (battery) if the circuit is shorted? (you may select more than one answer)
Stop working
Overheat
Nothing
Double its power
Name three types of power sources you can use.
If a circuit has a 9V battery and a total resistance of 180 ohms, how much current will be flowing through it?
5amps
50amps
.5amps
.05amps
What is the purpose of a capacitor?
Store energy
Regulate voltage
Regulate current
Emit light
If you have a 12V motor and a cell phone that can only withstand 5V, what type of voltage regulator will you need?
LM7812
LM7809
LM7805
LM7836
If you removed a lamp from a parallel circuit that had three paths, what would happen to the other two lamps?
How can understanding short circuits assist us in the future when dealing with electrical circuits?
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