Question

A 0.360-m-long metal bar is pulled to the left by an applied force $F$. The bar rides on parallel metal rails connected through a 45.0-$\Omega$ resistor, as shown in $\textbf{Fig. E29.31}$, so the apparatus makes a complete circuit. You can ignore the resistance of the bar and rails. The circuit is in a uniform 0.650-T magnetic field that is directed out of the plane of the figure. At the instant when the bar is moving to the left at 5.90 m/s, (a) is the induced current in the circuit clockwise or counterclockwise and (b) what is the rate at which the applied force is doing work on the bar?

          A 0.360-m-long metal bar is pulled to the left by an applied force $F$. The bar rides on parallel metal rails connected through a 45.0-$\Omega$ resistor, as shown in $\textbf{Fig. E29.31}$, so the apparatus makes a complete circuit. You can ignore the resistance of the bar and rails. The circuit is in a uniform 0.650-T magnetic field that is directed out of the plane of the figure. At the instant when the bar is moving to the left at 5.90 m/s, (a) is the induced current in the circuit clockwise or counterclockwise and (b) what is the rate at which the applied force is doing work on the bar?

Added by Melinda V.

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