Electric field for undeflected motion
A beam in a falling magnet investigation must pass straight through a \(0.34\,\text{T}\) magnetic field at speed \(5200\,\text{m s}^{-1}\). Calculate the electric field needed. Use the diagram labels before calculating the requested value. 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.