Which of the following is not the unit of sel | vedclass

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(C) The self-inductance $L$ is defined by the relation $\phi = LI$,where $\phi$ is magnetic flux and $I$ is current. Thus,$L = \phi / I$. The unit of

Vedclass · Accepted Answer

Joule-Ampere

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(C) The self-inductance $L$ is defined by the relation $\phi = LI$,where $\phi$ is magnetic flux and $I$ is current. Thus,$L = \phi / I$. The unit of flux $\phi$ is Weber $(Wb)$ and current $I$ is Ampere $(A)$,so $L$ has units of $Wb/A$ (Henry). Since $V = L(dI/dt)$,we have $L = V \cdot t / I$. Since $V/I = R$ (Ohm),$L$ has units of $Ohm \cdot s$. Energy stored in an inductor is $U = \frac{1}{2}LI^2$,so $L = 2U/I^2$. Since $U$ is in Joules $(J)$,$L$ has units of $J/A^2$ or $J \cdot A^{-2}$. Comparing these with the options,$J \cdot A$ is not a unit of self-inductance. Therefore,option $C$ is correct.

Which of the following is not the unit of self-inductance?

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