Basic Circuits
A continuous loop of metal that allows electricity to flow.
What is a circuit?
This instrument is used to measure electrical current.
What is an Ammeter?
In the formula V = I xR, the letter I stands for this.
What is Current?
This component allows current to flow in only one direction.
What is a Diode?
Substances like plastic or rubber that do not allow electricity to flow.
What are Insulators?
These sub-atomic particles are what actually flow through a wire.
What are Electrons?
These are the units used to measure Resistance.
What are Ohms
Calculate the Voltage if Current is 0.5A and Resistance is 20ohms.
What is 10V?
This component's resistance decreases when light shines on it.
What is an LDR?
This is another name for Voltage.
Potential Difference
In this type of circuit, if one bulb blows, the rest stay lit.
What is Parallel?
A voltmeter must always be connected in this way to a component.
What is Parallel?
This law states that current is directly proportional to voltage.
What is Ohm’s Law?
This is what "LED" stands for.
Light Emitting Diode
The amount of energy converted to another form in one second.
Power
In this type of circuit, the current is the same at every point.
What is Series?
This is the instrument used to measure electrical power.
What is a Wattmeter?
Calculate the Resistance if Voltage is 150V and Current is 7.5A.
20 ohms
This component's resistance decreases when it is heated.
What is a Thermistor?
This is the unit of measurement for Electrical Power.
WATT (W)
This part of a lightbulb slows down electrons and glows white hot.
What is the Filament?
To measure resistance, you must use this specific instrument.
What is an Ohmmeter?
A 2000W heater is plugged into a 230V supply. Calculate the current (I).
8.69A I=P/V
On an LED, this is how you identify which leg is negative.
What is the shorter leg?
This graph shape shows that current and voltage are "directly proportional."
straight line through the origin