Show:
Magnetism
Electromagnets
Motor vs Generator
Electricity
Miscellaneous
100
What must be lined up for a magnet to be magnetized?
What is domains
100
What is a possible power source for an electromagnet?
What is a battery.
100
Name a possible energy source of an electric motor.
What is a battery
100
Where does our power originate?
What is a power plant.
100
What is a dependent variable?
What is something that is the result of a change in an experiment.
200
Draw the domains of a demagnetized object.
What is see picture
200
What part of the electromagnet becomes magnetic?
What is the iron nail
200
What is mechanical energy?
What is energy associated with motion
200
What is the difference between an open and closed circuit?
What is an open circuit allows electricity to flow through and a closed circuit does not.
200
What is a constant?
What is something that does not change in an experiment.
300
Describe how you can use a bar magnet to make a iron nail magnetic.
What is you would rub the nail with the pole of a bar magnet in one direction.
300
Would an electromagnet be considered an example of a circuit? Explain.
What is yes, because all of the parts are connected so electricity can flow through.
300
What is the difference between an electric motor and generator?
What is a motor converts electrical to mechanical energy and a generator converts mechanical to electrical energy.
300
Describe how you can make a current using a galvanometer, iron ring, wire, and bar magnet.
What is you could wrap the wire around the iron ring, connect it to the galvanometer, and put a bar magnet in and out of the coiled ring.
300
What is the problem of our challenge?
What is a pole has fallen on top of our parent's car and the car needs to be moved to make room for the new car.
400
What are two differences between a bar magnet’s magnetic field and the Earth’s magnetic field?
What is the Earth's magnetic field is stronger, over a larger scale, and will be less likely to lose its magnetism. Answers will vary.
400
What are the two ways to increase the strength of an electromagnet?
What is increase the number of coils and voltage.
400
John created a device to power his television made from the following materials: A stationary bicycle, a thick rubber band, a magnet, a coil, and a wire. The stationary bicycle is considered to be the power source. What device did John create?
What is an electric generator
400
What device measures current?
What is a galvanometer
400
Name three things you should include in your plan for your challenge.
What is the materials, how much of each material, how you will make your device, group responsibilities
500
Describe why the magnetic south pole is near the geographic north pole.
What is opposites attract so the north and south pole will be attracted to each other.
500
Explain how more coils in an electromagnet can lead to a stronger electromagnet.
What is when there are more coils around the iron core, there is more electricity flowing through it to increase the strength
500
What is the role of magnets in an electric motor?
What is magnets help by creating motion because like poles repel
500
What is the difference between a step-up and step-down transformer?
What is a step-up transformer increases the voltage and decrease current. Step-down transformers decrease the voltage and increase current
500
Marcy wants to see how many paper clips she can pick up. She uses an iron nail, a wooden rod, and an iron screw. She wraps the wire around the object 20 times. She picks up 10 paper clips with the iron nail, 0 with the wooden rod, and 4 with the iron screw. What is the independent variable? Explain.
What is the type of core used because it is what you are changing to see the result.