A straight stiff wire of length 1.00 m and mass 21g is, Ask an Expert

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Q. A straight, stiff wire of length 1.00 m and mass 21 g is suspended in a magnetic field B = 0.58 T. The wire is connected to an emf. How much current must flow in the wire and in what direction so that the wire is suspended and the tension in the supporting wires is zero?

Q. A 185 watt motor is used to lift a 142 kg container to a height of 7 m. How much time does it take to lift the container with the motor?

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