Question

A horizontal straight conductor when placed along south-north direction falls under gravlty there is

• A. an induced current form south to north direction
• B. an induced current from north-to-south direction
• C. no induced emf along the length of the conductor
• D. an induced jgrnf aldng the length of the conductor

Answer 1

Answer: (C)

• We Know induced emf $\vec{E}=\vec{B}\cdot (\vec{l}\times \vec{v})$
• The earth's magnetic field lines are along the north south direction which is parallel to the length of the moving rod.
Therefore, no emf is induced along the length in the rod.