PhysicsHardHigh School (11–12)Electricity & Magnetism › Electromagnetic InductionElectricity & Magnetism › Magnetic Effects of CurrentJEE MainAPA-LevelIB
Created by StemPy LabA long wire is wound into a solenoid of length and radius , with evenly spaced turns. Its inductance is . The same wire is wound again into a solenoid of the same length , with evenly spaced turns, on a former of half the radius. What is the new inductance?
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← A magnet of mass 0.062 kg falls through an aluminium tube 0.95 m long. It moves at a steady speed of 0.069 m/s all the way. How much heat do the eddy currents make in the tube during the passage? Take g = 9.8 m/s².The current in a coil of inductance 0.43 H varies with time as I = 4.0t² - 2.0t, with I in A and t in s. What is the size of the self-induced emf at t = 0.95 s? →
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