Two long coaxial solenoid, each of length l. The outer solenoid has an area of cross section A1 and number of turns /length n1. The corresponding value of the inner solenoid are A2 and n2. Write the expression for self inductance L1 L2 of the two coils and their mutual inductance M. Hence show that M

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Q. Define the term 'mutual inductance' between the two coils. Obtain the expression for mutual inductance of a pair of long coaxial solenoids each of length

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