Motional emf and Lenz direction
A rod in a mass spectrometer trial of length \(0.26\,\text{m}\) moves at \(1.4\,\text{m s}^{-1}\) perpendicular to a \(0.37\,\text{T}\) field. Calculate motional emf. Enter the numerical result and choose the interpretation that matches the field physics.
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Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.