Current & Charges
What is the continuous, steady flow of electric charges through a material called?
What is electric current?
What interaction occurs when you bring the north pole of one bar magnet near the south pole of another?
What is attraction (they attract each other)?
Which specific region on a bar magnet exerts the absolute strongest magnetic force on nearby iron filings?
What are the magnetic poles (North and South)?
What is a simple coil of wire carrying an electric current to create a magnetic field called?
What is a solenoid?
When testing a prototype electromagnet, why is it critical to test only one variable at a time?
What is to isolate which specific change caused the improvement or failure?
What type of material prevents or impedes the free flow of electric charges?
What is an electric insulator?
Why are magnetic and electric forces classified as non-contact forces?
What is because they can exert force across a distance without physically touching?
What energy transformation occurs inside an electric motor?
What is converting electrical energy into mechanical energy?
What key addition turns a basic solenoid into a powerful electromagnet?
What is a ferromagnetic core (like iron inside the wire coil)?
If two positively charged particles are brought closer together, what happens to the repulsive force between them?
What is the repulsive force increases?
Copper, iron, and aluminum all belong to what group of materials that allow electric charges to flow easily?
What are conductors?
What primary two factors determine the overall strength of the electric force between two charged objects?
What are the magnitude of the charges and the distance between them
What energy conversion takes place in a generator?
What is converting mechanical energy into electrical energy?
Name three specific modifications you can make to increase the strength of an electromagnet.
What are adding/increasing an iron core, increasing voltage/current, and increasing the number of wire loops?
If you increase the distance between two negatively charged balloons, what happens to the repulsive force between them?
What is the repulsive force decreases?
What immediately generates in the space surrounding a wire as soon as an electric current begins flowing through it?
What is a magnetic field?
If the distance between two charged particles is cut in half, what happens to the electric force between them?
What is it becomes 4 times stronger?
Moving a magnet back and forth inside a coil of wire causes a lightbulb to light up. What phenomenon is being demonstrated?
What is electromagnetic induction?
Balloon A has a net charge of +2 and Balloon B has a net charge of +8. Which balloon creates a stronger electric field, and why?
hat is Balloon B, because it has a greater magnitude of charge
Maya and Liam's prototype electromagnet picks up 4 paperclips, but they need to pick up 20. What is the correct next step in their engineering process?
What is to change one variable at a time (such as adding more wire loops while keeping voltage constant) and re-test?