Self and Mutual Induction

Two coils have inductances L₁ = 1200 mH and L₂ = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductor is measured to be 2500 mH then Mutual inductor between the coils is ___________ mH.

The SI unit of coefficient of mutual induction is

The S.I. unit of self-inductance of a coil is 

The circuit arrangement given below shows that when A.C. passes through the coil $A$, the current starts flowing in coil $B$.

Mention the underlying principle involved.

Two coils are fixed in space at some distance from each other such that there is a flux linkage between them. When coil $1$ has no current and the current in the coil $2$ increases at the rate $15.0$ $\mathrm{A} {\mathrm{s}}^{-1}$, the emf in the coil $1$ is $25.0 \mathrm{mV}$. When coil $2$ has a current of $3.6 \mathrm{A}$, the flux linkage in coil $2$ (in $\mathrm{mWb}$) is 

If $0.1\mathrm{ J}$ of energy is stored for the flow of current of $0.2 \mathrm{A}$ in an inductor, then its inductance value is

Two coils are fixed in space at some distance from each other such that there is a flux linkage between them. When coil $1$ has no current and the current in the coil $2$ increases at the rate $15.0$ $\mathrm{A} {\mathrm{s}}^{-1}$, the emf in the coil $1$ is $25.0 \mathrm{mV}$. When coil $2$ has a current of $3.6 \mathrm{A}$, the flux linkage in coil $2$ (in $\mathrm{mWb}$) is 

Mutual inductance between two magnetically coupled coils depend on​;

What are the factors affecting mutual inductance of a pair of coils define coefficient of coupling ?

What are the effects of the coefficient coupling in a mutual inductive circuit ?

The value of coefficient of mutual induction for the arrangement of two coils shown in the figure will be :

The magnetic field stored per unit volume is $\mathrm{nBH} \mathrm{J}/{\mathrm{m}}^3$. Here the value of $n$ is ?

Write the energy density formula in the case of a magnetic field or inductor.

The magnetic energy per unit volume is

The flux linked with a coil at any instant $t$ is given by: $\varphi = 2t^2–t+1$. The magnitude of induced emf at $t=3$ $\sec$ is.

The physical quantity which is measured in the unit of $\mathrm{Wb} {\mathrm{A}}^{-1}$ is

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area $\mathit{\text{A}}=\text{10 }{\text{cm}}^2$ and length$=20 \mathrm{cm}$. If one of the solenoids has $300$ turns and the other $400$ turns, their mutual inductance is $\left({\mathrm{\mu }}_0=4\mathrm{\pi }\times {\mathrm{10}}^{-7} \mathrm{T} \mathrm{m} {\mathrm{A}}^{-1}\right)$

If the number of turns per unit length of a coil of solenoid is doubled, the self-inductance of the solenoid will