Electromagnets and Applications
Physics ⇒ Electricity and Magnetism
Electromagnets and Applications starts at 8 and continues till grade 12.
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See sample questions for grade 9
A scrapyard uses a large electromagnet to lift cars. Why is an electromagnet used instead of a permanent magnet?
A solenoid is a coil of wire. What happens to the magnetic field inside the solenoid when the current is increased?
A student wraps 100 turns of wire around an iron nail and connects it to a battery. What type of magnet has the student created?
Describe how an electric bell works using an electromagnet.
Describe how the direction of the current affects the polarity of an electromagnet.
Describe one way to make an electromagnet stronger without changing the current.
Explain why an electromagnet is considered a temporary magnet.
Explain why electromagnets are used in electric motors.
Explain why soft iron is preferred as the core material in electromagnets.
Explain why the magnetic field of an electromagnet is considered temporary.
If the current in an electromagnet is doubled, what happens to the strength of the magnetic field?
Name one everyday application of electromagnets.
State one advantage of using an electromagnet over a permanent magnet.
State the rule used to determine the direction of the magnetic field around a current-carrying conductor.
What happens to the magnetic field of an electromagnet if the core is removed?
What is an electromagnet?
