There are $10$ turns in coil $M$ and $15$ turns in coil $N$ . If a current of $2\ A$ is passed through coil $M$ then the flux linked with coil $N$ is $1.8 × 10^{-3}\ Wb$ . If a current of $3\ A$ is passed through coil $N$ then flux linked with coil $M$ is
$1.2 × 10^{-3} \ Wb$
$2.7 × 10^{-3} \ Wb$
$1.8 × 10^{-3} \ Wb$
$4.05× 10^{-3} \ Wb$
$A$ long straight wire is placed along the axis of a circular ring of radius $R$. The mutual inductance of this system is
A coil of radius $1\, cm$ and of turns $100$ is placed in the middle of a long solenoid of radius $5\, cm$. and having $5\, turns/cm$. parallel to the axis of solenoid The mutual inductance in millihenery will be
Two coils $X$ and $Y$ are placed in a circuit such that when a current changes $2A$ in coil $X,$ the magnetic flux changes by $0.4\,weber$ in $Y$. The value of mutual inductance of the coils....$H$
Two coaxial coils are very close to each other and their mutual inductance is $5 \,mH$. If a current $50 sin 500 \,t$ is passed in one of the coils then the peak value of induced e.m.f in the secondary coil will be ........... $V$
Find the mutual inductance in the arrangement, when a small circular loop of wire of radius ' $R$ ' is placed inside a large square loop of wire of side $L$ $( L \gg R )$. The loops are coplanar and their centres coincide :