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Solution: A metal bar is pulled to the right perpendicular to a unifor...

Question

A metal bar is pulled to the right perpendicular to a uniform magnetic field. The bar rides on parallel metal rails connected through a resistor, as shown in the figure below, so the apparatus makes complete circuit. Find the direction of the current induced in the circuit in two ways:

a) By looking at the magnetic force on the charges in the moving bar.

b) Using Lenz's Law