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A 11.2 m long steel beam is accidentally dropped by a construction crane from a height of 9.76 m. The horizontal component of the Earth's magnetic field over the region is 16.9 μT. What is the induced EMF in the beam just before impact with the Earth, assuming its long dimension remains in a horizontal plane, oriented perpendicularly to the horizontal component of the Earth's magnetic field?
In the figure, the rolling axle, 1.71 m long, is pushed along horizontal rails at a constant speed v = B V 2.61 m/s. A resistor R: = 0.340 is connected to the rails at points a and b, directly opposite each other. The wheels make good electrical contact with the rails, and so the axle, rails, and R form a closed-loop circuit. The only significant resistance in the circuit is R. There is a uniform magnetic field B 7.30×10-² T vertically downward. Calculate the induced current I in the resistor. = Submit Answer Tries 0/12 What horizontal force F is required to keep the axle rolling at constant speed? Submit Answer Tries 0/12 Calculate the size of the potential difference between point a and point b. Submit Answer Tries 0/12