Electromagnetism Quiz

What is the relationship between electricity and magnetism called?

• Electrostatics

• Electromagnetism

• Magnetic induction

• Electrical resistance

What does a solenoid consist of?

• A straight wire with current

• A loop of wire with no current

• A coil of wire with current flowing through it

• A single magnetized iron bar

Which material is commonly used as the core of an electromagnet?

• Iron

• Aluminum

• Copper

• Wood

What happens when you turn off the current in an electromagnet?

• The magnetic field becomes stronger

• The magnetic field disappears

• The magnetic field reverses

• The electromagnet attracts non-metal objects

Who discovered the relationship between electricity and magnetism?

• Nikola Tesla

• Hans Christian Ørsted

• Michael Faraday

• James Clerk Maxwell

What did Ørsted observe when he placed a compass near a current-carrying wire?

• The compass stopped working

• The compass needle moved, showing a magnetic field was created

• The wire melted

• The battery drained instantly

If the direction of the current in a wire is reversed, what happens to the magnetic field?

• It also reverses direction

• It becomes weaker

• It disappears permanently

• It rotates randomly

What rule helps determine the direction of a magnetic field around a straight wire?

• Right-Hand Rule

• Newton’s Law

• Fleming’s Left-Hand Rule

• Ohm’s Law

What happens to the magnetic field strength when the current is increased?

• It decreases

• It increases

• It remains the same

• It fluctuates randomly

Which of these is NOT a use of electromagnets?

• MRI machines

• Electric motors

• Solar panels

• Cranes for lifting heavy metals