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Question: A long coaxial cable consists of two cylindrical shells. The inner cylinder with radius a carries a uniform line charge +λ (charge per unit length along the z direction), and the outer cylinder has a radius b and carries a line charge -λ. The charges move with velocity ¯v = vˆz along the surfaces of cylinders.
(a) Calculate the magnetic field: between the cylinders (a<s<b), inside (s<a) and outside (s<b)
(b) calculate the magnetic energy stored in the cable for a section of length /.
A satellite of mass 190 kg is placed into Earth orbit at a height of 400 km above the surface. how long does the satellite take to complete one orbit
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A car travels due east with a speed of 44.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. Find the velocity of the rain
A 4.0-cm-diameter parallel-plate capacitor has a 0.54 mm gap. What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at 500,000V/s?
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