What is a disadvantage of connecting bulbs in series?
If one light bulb dies, the circuit is open, and the lights get dimmer if you add more batteries.
100
What is a switch used for?
A switch is used to start and stop the flow of an electric current in a circuit.
100
What is an electromagnet?
A temporary magnet made when electric current flows through a wire wrapped around an iron core.
100
What is a circuit?
The path that an electric current follows
100
Imagine you had two batteries wired in series and one bulb. How many paths of electricity are there?
1
200
What is a disadvantage of connecting batteries in series?
If one battery dies the circuit is open.
200
Where does the electric current leave the battery?
The negative end of the battery has extra electrons. They follow the path that leads them to the positive end of the battery which is missing electrons.
200
What are three items needed to create an electromagnet?
Iron core, a coil of wire, a source of electricity.
200
What is an electric current?
The flow of electricity
200
Imagine you had two batteries wired in series and two bulbs wired in series. What would happen to bulb 2 if bulb 1 burns out?
It would stop glowing
300
What is an advantage of connecting bulbs in parallel?
If one bulb dies the circuit is still closed, because there is more than one path. Each bulb also gets all the power because each bulb has its own bath and aren't sharing the power.
300
What are four good conductors?
Aluminum, copper, gold, silver
300
Why is an electromagnet considered temporary?
If your power source goes out or gets disconnected, your iron core is no longer magnetic.
300
What is a filament?
The part of a light bulb that glows when an electric current passes through it.
300
Which lights are brighter?
Circuit A with two batteries wired in parallel and two bulbs wired in series
or
Circuit B with two batteries wired in series and two bulbs wired in series.
B
400
What is an advantage of connecting batteries in parallel?
If one battery dies the circuit is still complete/closed. There is more than one path.
400
What are three good insulators?
Rubber, plastic, glass
400
What are three ways to make an electromagnet stronger?
Wrap the wire more times, stronger power source (more batteries), larger iron core
400
What is the difference between an open and closed circuit?
An open circuit does not allow an electric current to flow because the path is not complete. A closed circuit has a complete path along which an electric current flows.
400
Imagine you had 2 batteries wired in parallel and two bulbs wired in parallel. How many different paths are there for the electrons?
2 batteries wired in parallel + two bulbs wired in parallel = 4 paths for the electrons
500
What is a disadvantage of connecting batteries in parallel?
The lights don't get brighter because the volts/electrons aren't combined.
500
How are batteries connected differently in a parallel circuit than in a series circuit.
In parallel circuits, each battery has its own path and they are connected negative to negative and positive to positive. In a series circuit, there is one single path and the batteries are connected negative to positive.
500
1. What are four uses for an electromagnet?
Lift cars in a junk yard, clean up nails and metal scraps on construction sites, small motors in hair dryers and toys, doors to the modular, MRI
500
What is the difference between and insulator and conductor?
An insulator is a material that does not allow an electric current to flow/pass easily through it: used to protect us from electric current. A conductor is a material that allows an electric current to easily flow/pass through it.
500
Imagine you had two batteries wired in series and two bulbs wired in parallel. What would happen if the second bulb burned out?
Two batteries and two bulbs wired in parallel - one bulb that blew out = one closed and complete path left