Problem

A 1.50-m-long metal bar is pulled to the right at a steady 5.0 m/s perpendicular to a unif...

A 1.50-m-long metal bar is pulled to the right at a steady 5.0 m/s perpendicular to a uniform, 0.750 T magnetic field. The bar rides on parallel metal rails connected through a 25.0 Ω resistor, as shown in Figure, so the apparatus makes a complete circuit. You can ignore the resistance of the bar and the rails. (a) Calculate the magnitude of the emf induced in the circuit. (b) Find the direction of the current induced in the circuit (i) using the magnetic force on the charges in the moving bar; (ii) using Faraday’s law (iii) Using Lenz’s law (c) Calculate the current through the resistor.

Figure:

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