First slide

Physical quantities and units

Question

Which of the following is not the $S I$ unit of the inductance

Moderate

A

weber/ampere
B

volt-second/ampere
C

${joule/(ampere)}^{2}$
D

ohm-(second)²

Solution

$L = \frac{ϕ}{i} or henry = \frac{weber}{ampere} e = - L (\frac{d i}{d t}) ∴ L = - \frac{e}{(d i / d t)} O r henry = \frac{volt - second}{ampere} U = \frac{1}{2} L i^{2} ∴ L = R or henry = ohm-second$

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