Two solenoids `A` and `B` spaced close to each other and sharing the same cylindrical
Channel: Doubtnut
Date: 12/07/2020

Two solenoids `A` and `B` spaced close to each other and sharing the same cylindrical axis have `400` and `700` turns, respectively. A current of `3.50A` in coil `A` produced an average flux of `300muT-m^2` through each turn of `A` and `a` flux of `90.0mT-m^2` through each turn of `B`.  a. Calculate the mutual inductance of the two solenoids.  b.What is the self inductance of `A`?  c. What emf is induced in `B` when the current in `A` increases at the rate of `0.5A//s`?