Question

The unit of self inductance is

• A. Joule / Ampere
• B. Volt / Ampere
• C. Volt - Ampere / Second
• D. Volt - Second / Ampere

Answer 1

Answer: (D)

Volt - Second / Ampere

Answer 2

As we know, $EMF$ induced in a coil of self-inductance $L$ is given as
$E = -L \frac{dI}{dt}$
$L = -E \frac{dt}{dI}$
So, SI unit of $L = \frac{\text{Volt second }}{\text{Ampere}}$
Hence, the unit of self induction is
Volt-second/Ampere.