The mutual inductance between two coils is $1.25$ $henry$. If the current in the primary changes at the rate of $80$ $ampere/second,$ then the induced $e.m.f$ in the secondary is......$V$

Write formula for mutual inductance for two very long coaxial solenoids of length $\mathrm{l}$.

Explain mutual induction and derive equation of mutual $\mathrm{emf}$.

Two coils have a mutual inductance $0.005\,H$ . The current changes in the first coil The current changes in the first coil according to the equation $I = I_0 sin\,\omega t$ , where $I_0 = 10\,A$ and $\omega  = 100\pi \,rad/s$ . The maximum value of $emf$ in the second coil will be

A very long straight conductor and isosceles triangular conductor lie in a plane and are separated from each other as shown in the figure. If $a = 10\ cm , b = 20\ cm$ and $h = 10\ cm$ , find the coefficient of mutuaI induction

An $e.m.f.$ of $100$ $millivolts$ is induced in a coil when the current in another nearby coil becomes $10$ $ampere$ from zero in $0.1$ $second.$ The coefficient of mutual induction between the two coils will be....$millihenry$