Question

Which movement can change the number of magnetic field lines passing through a coil near a solenoid?

Options

• A coil is moved in front of a solenoid

• A solenoid remains separate from a magnetic field

• A conductor is wound into loops

• A magnetic compass needle is placed near a conductor

Answer 1

Moving a coil in front of a solenoid can change the magnetic field lines passing through it. Under Faraday’s Law of Induction, that change induces a current in the coil.