Motional emf and Lenz direction
A rod in a falling magnet investigation of length \(0.18\,\text{m}\) moves at \(1.6\,\text{m s}^{-1}\) perpendicular to a \(0.41\,\text{T}\) field. Calculate motional emf. Enter the numerical result and choose the interpretation that matches the field physics.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.