1.0 Times 10^-4 T near the North Pole and 1.0 Times 10^-5 T near the equator. If

Question

1.0 Times 10^-4 T near the North Pole and 1.0 Times 10^-5 T near the equator. If the boy runs with a speed of 1.3m/s northward near each location, and the rod is 1.5 m long, calculate the induced emf in the rod in each location. A metal airplane with a wingspan of 30 m flies horizontally along a north-south route in the northern hemisphere at a constant speed of 320 km/h in a region where the vertical component of the Earth's magnetic field is 5.0 Times 10^-5 T. What is the magnitude of the induced emf between the tips of its wings? If the easternmost wing tip is negatively charged, is the plane flying due north or due south? Explain. Suppose that the metal rod in Fig. 20.11 is 20 cm long and is moving at a speed of 10 m/s in a magnetic field of 0.30 T and that the metal frame is covered with an insulating material. Find the magnitude of the induced emf across the rod and the current in the rod. Repeat these calculations if the wire were not covered and the total resistance of the circuit (rod plus frame) were 0.15 Ohm. The flux through a loop of wire changes uniformly from +40 Wb to -20 Wb in 1.5 ms. What is the significance of the negative number attached to the final flux value? What

Explanation / Answer

12)

a)

induced emf =BvL =5*10-5*320*30 =0.48volt

b) south

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