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A 12-Kg Rod That Has a Length of 1 Ω\varOmega Slides with Constant Speed Down a Pair of Frictionless Vertical

question 55

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A 1.2-kg rod that has a length of 1.0 m and a resistance of 5.0 Ω\varOmega slides with constant speed down a pair of frictionless vertical conducting rails that are joined at the bottom. Other than the rod, the rest of the circuit is resistanceless. A uniform magnetic field of magnitude 3.0 T is perpendicular to the plane formed by the rod and the rails as shown. Determine the speed of the rod.  A 1.2-kg rod that has a length of 1.0 m and a resistance of 5.0  \varOmega  slides with constant speed down a pair of frictionless vertical conducting rails that are joined at the bottom. Other than the rod, the rest of the circuit is resistanceless. A uniform magnetic field of magnitude 3.0 T is perpendicular to the plane formed by the rod and the rails as shown. Determine the speed of the rod.   A) 0.38 m/s B) 0.90 m/s C) 2.6 m/s D) 6.5 m/s E) 8.7 m/s


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