NEET 2018 Physics question
Not in JEE Advanced syllabus
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
Solution
A static magnetic field does no work by itself; the energy must come from the agent that maintains the field. The electromagnet's field is sustained by the current from the source. When the rod moves, the induced emf in the coils changes the current, and the source supplies the extra energy needed to keep the current
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account