- Electricity & Magnetism
EMF in a current-carrying system.
A bar is moving across a open-ended loop with resistance R in a presence of a constant perpendicular magnetic field.
a. At what speed should the bar be moved to produce a current of 0.500 A?
b. What is the motional emf?
c. What is the power dissipated by the resistor?
d. What force must be applied to the bar?
The solution demonstrates step by step how to get from changes in the flux to power dissipation in the circuit.