Question 268: Electromagnetic Induction

Question

SI units of self inductance is

Accepted Answer

The SI unit of self-inductance is the henry (H). The henry can be defined in terms of other basic SI units (volt, ampere, and second). The correct unit for inductance is based on the definition of inductance in a circuit, which is the ratio of the induced voltage (in volts, V) to the rate of change of current (in amperes per second, A/s). Therefore, the unit of inductance (henry) can be expressed as:
$
\frac{\mathrm{V}}{(\mathrm{A}/\mathrm{s})}
$
When we resolve the rate - the division of amperes by seconds - we invert and multiply, which gives us volts times seconds per ampere:
$
\mathrm{V} 	imes \frac{\mathrm{s}}{\mathrm{A}}
$
This is equivalent to volt-seconds per ampere, which we write as:
$
\frac{\mathrm{V} 	imes \mathrm{s}}{\mathrm{A}}
$
From the options provided, the correct one that matches the unit of self-inductance (henry) is:
Option C: $\frac{\mathrm{V} 	imes \mathrm{s}}{\mathrm{A}}$

Answer

$\frac{\mathrm{V}-\mathrm{A}}{\mathrm{S}}$

Answer

$\frac{\mathrm{V}}{\mathrm{A}-\mathrm{S}}$

Answer

$\frac{\mathrm{V}-\mathrm{S}}{\mathrm{A}}$

Answer

$\frac{\mathrm{A}}{\mathrm{V}-\mathrm{S}}$

Electromagnetic Induction

SI units of self inductance is

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