Question:
The unit of self inductance is
The unit of self inductance is
Updated On: Jun 20, 2022
- Joule / Ampere
- Volt / Ampere
- Volt - Ampere / Second
- Volt - Second / Ampere
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The Correct Option is D
Solution and Explanation
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.
$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.
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Concepts Used:
Inductance
Inductance is a key parameter in electrical and electronic circuit designs. Like resistance and capacitance, it is a basic electrical measurement that affects all circuits to some degree.
Inductance is used in many areas of electrical and electronic systems and circuits. The electronic components can be in a variety of forms and may be called by a variety of names: coils, inductors, chokes, transformers, . . . Each of these may also have a variety of different variants: with and without cores and the core materials may be of different types.
There are two ways in which inductance is used:
- Self-inductance: Self-inductance is the property of a circuit, often a coil, whereby a change in current causes a change in voltage in that circuit due to the magnetic effect of caused by the current flow. It can be seen that self-inductance applies to a single circuit - in other words it is an inductance, typically within a single coil. This effect is used in single coils or chokes.
- Mutual-inductance: Mutual inductance is an inductive effect where a change in current in one circuit causes a change in voltage across a second circuit as a result of a magnetic field that links both circuits. This effect is used in transformers.