Circuit Symbols
This measuring device is drawn as a circle with an A inside.
What is an ammeter?
The number of amps in a circuit that has 45 coulombs running through it in 15 seconds.
What is 3A?
A measure of the rate at which electrons flow past a point in a circuit.
What is current?
Rubbing a balloon on your hair is an example of this type of charging.
What is friction?
The type of current used in homes where electrons change direction many times per second.
What is alternating current (AC)?
This measuring device is drawn as a circle with a V inside.
What is a voltmeter?
The amount of resistance a light bulb creates if it has a current of 7A in a 21V circuit.
What is 3 ohms?
The push or force that drives electrons through a circuit.
What is voltage?
Objects with the same charge do this when near each other.
What is repel?
This safety device automatically opens the circuit when too much current flows.
What is a circuit breaker or fuse?
This load is drawn as a circle with an X inside.
What is a lamp?
The difference in electric potential (voltage) in a circuit where 20 joules of work (energy) are required to transfer 5 coulombs of charge from point X to point Y.
What is 4V?
A material that does not allow electrons to flow easily.
What is an insulator?
The sudden flow of electrons that causes lightning is called this.
What is electric discharge?
This type of power plant uses flowing water to spin a turbine and generate electricity.
What is hydroelectric?
This circuit component is drawn with two small circles and a line between them that can be open or closed.
What is a switch?
A light bulb that uses 60 J of electrical energy and produces 12 J of light energy has this percentage of efficiency.
What is 20%?
The total opposition to current in a circuit.
What is resistance?
When a charged object is brought close to an object causing charges in that object to rearrange.
What is induction?
In this type of circuit, if one bulb burns out, all the bulbs go out because there is only one path for current.
What is a series circuit?
This circuit component is drawn as two vertical lines, one longer than the other, representing positive and negative terminals.
What is a cell?
This is the formula one would you use to solve for time if given amperes and coulombs.
What is t = Q/I?
The process of removing excess electric charge by transferring electrons between a charged object and a large neutral object.
What is grounding?
The part of the atom transferred during static charging.
What are electrons?
Unlike voltmeters and ohmmeters, this device must be connected to a circuit in series.
What is an ammeter?