A 1.20-m-long metal bar is pulled to the right at a steady 5.9 m / s perpendicul
ID: 2244490 • Letter: A
Question
A 1.20-m-long metal bar is pulled to the right at a steady 5.9m/s perpendicular to a uniform, 0.790-T magnetic field. The bar rides on parallel metal rails connected through R = 26.0-?, as shown in the figure YF-29-20.jpg , 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.
C. Calculate the current through the resistor.
1.20-m-long metal bar is pulled to the right at a steady 5.9m/s perpendicular to a uniform, 0.790-T magnetic field. The bar rides on parallel metal rails connected through R = 26.0-?, as shown in the figure YF-29-20.jpg , so the apparatus makes a complete circuit. You can ignore the resistance of the bar and the rails. Calculate the magnitude of the emf induced in the circuit. Find the direction of the current induced in the circuit. Calculate the current through the resistor.Explanation / Answer
a. induced emf e = lvB
e = 1.2* 5.9*0.79 = 5.5932 volts
b. direction of incued current right to left
c. induced current i = eme /R = 5.5932/26 = 0.2151 Amps
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