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JEE Main 2008 Physics question

PhysicsElectromagnetic InductionJEE Main 2008

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their mutual inductance is

Answer: (4)

Solution

\frac{μ_0N_1N_2A}{l}\fracExtra open brace or missing close brace{4π×10^{-7}$×300×400×10

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Question ID VK-039029