Q. A 2.90 m long, 320 kg steel beam extends horizontally from the point where it has been bolted to the framework of the new building under construction. A 66 kg construction worker stands at the far end of the beam.
What is the magnitude of torque about the point where the beam is bolted in place?
Q. The magnetic flux that passes through one turn of a 12-turn coil of wire changes to 4.0 from 9 Wb in a time of 0.05 s. the average induced current in the coil is 230 A. what is the resistance of the wire?