Question

Statement I: An emf is induced in a long solenoid by a bar magnet that moves while totally inside it along the solenoid axis.
Statement II: As the magnet moves inside the solenoid the flux through individual turns of the solenoid changes.

• A. If both statements are true and statement II is the correct explanation of statement I.
• B. If both statements are true but statement II is not the correct explanation of statement I.
• C. If statement I is true but statement II is false.
• D. If statement I is false but statement II is true.

Answer 1

Answer: (D)

Even though flux through individual lines changes, it remains unchanged for the solenoid as a whole. Therefore no emf is induced in the long solenoid.