a current where the charges always flow in the same direction.
What is direct current?
100
a circuit in which all parts are connected in a single loop.
What is a series?
100
The rate at which charge passes a given point. Unit = ampere (A) amp for short
Symbol- I
What is current?
100
a safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level. Can be used once and then must be replaced.
What is a fuse?
100
a device that converts chemical energy into electrical energy
What is a battery?
200
Material that offers little resistance to the flow of an electric current. Most metals.
What is a conductor?
200
In this type of circuit, all loads share the same current.
What is a series?
200
the difference in energy per unit charge as a charge moves between two points in the path of a current. This is the same as electric potential or potential difference. Symbol- V
What is Voltage?
200
Do NOT hold the switch closed for more than one or two seconds because it drains the ___________.
What is battery?
200
a mixture of chemicals that conducts a current in a cell
What is an electrolyte?
300
a device which acts like a bar magnet when an electric current is flowing through the coils.
What is an electromagnet?
300
A circuit in which different loads are located on separate branches.
What is a parallel circuit?
300
the opposition to the flow of electric charge. Symbol - R
What is resistance?
300
occurs when the charges bypass the loads. If this happens, the resistance drops, and the current increases. Too much current = a lot of heat and possibly a fire.
What is a short circuit?
300
this surrounds a wire carrying an electrical current
What is a magnetic field?
400
a current where the charges continually switch from flowing in one direction to flowing in the reverse direction.
What is alternating current?
400
In this type of circuit, if one load is missing or broken, the other loads will not work.
What is a series circuit?
400
An object's resistance depends on the object's material, thickness, length, and ______________.
What is temperature?
400
a device that uses electrical energy
What is a load?
400
This rule states that if you grasp the wire with your left hand and extend your thumb in the direction of the current, then the magnetic field is the direction your fingers curl.
What is the "Left hand rule".
500
A material that strongly opposes the flow of electric current. Most nonmetals.
What is an insulator?
500
In this type of circuit, if one of the loads is broken or missing, it does not affect the other loads.
What is a parallel circuit?
500
Thick and short wires have _______ resistance than thin and long wires.
What is less?
500
an electrical switch that interrupts current flow if a surge of electricity passes through it to protect the circuit from damage. Can be reset and used many times.
What is a circuit breaker?
500
The strength of an electromagnet depends on these three things:
What is
a. the number of loops in a coil,
b. the amount of current flowing through the coil
c. the material that is inside the coil