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Unit of Inductance - Definition, Types, FAQs

Unit of Inductance - Definition, Types, FAQs

Edited By Team Careers360 | Updated on May 30, 2022 11:13 AM IST

Introduction
In this chapter, we will study: What is Inductance?, SI unit of Inductance. We will also learn about types of inductance and see their application.

What is Inductance?

Inductance is an electrical term, tendency shown by the inductor to oppose any change in Electric Current flowing in it. It is denoted by (L). It is also called specific inductance.

SI unit of Inductance

Henry is the SI unit of Inductance. It is named after American scientist Joseph Henry.

Also read -

Definition of 1 Henry

To generate a voltage of 1 volt when current is changing 1 ampere per second, then inductance is 1 Henry.

V(t)=Ldi/dt

Where, L is inductance and current ⅆi/ⅆt is the rate of change of current.

Related Topics Link,

Types of Inductance

Self-inductance:

It is a property of a current-carrying coil, which opposes any change in current flowing in it. The EMF produced in the coil resist increases in the current if there is an increase in current and the same is true for decrease also or

Expression for self inductance is given by

vL=- N ⅆφ/ⅆt-

Where, vL is equal to induced EMF

And ⅆφ/ⅆt- is equal to rate of change of magnetic flux

SI unit of self induction is Henry.

NOTE: The negative sign indicates that EMF produced is in the opposite direction or it is resisting.

Also Read:

Mutual Inductance

In mutual inductance, when two coils are brought close to each other with a magnetic field in one coil then EMF is induced in the second coil also, or

EMF induced is given by:

-\varepsilon_{12}=N_1\frac{d\phi _{12}}{dt}

Where, ε12 is EMF produced by the first coil on 2 coils.

dΦ12/ⅆt is equal to the rate of change of magnetic flux in coil 2 by magnetic field generated by coil 1.

Also check-

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NCERT Physics Notes:

Frequently Asked Questions (FAQs)

1. What is the SI unit of Inductance?

Henry is the SI unit of inductance.

2. What is the value of 1 millihenry?

As we know, 1 Henry equal 1000 millihenry , so 1 millihenry equals 0.001 Henry

3. Which of the following is the unit of Inductance? A. Henry B. Farad C. Coulomb D. Ampere

As we know, the Henry is the Unit of Inductance is Henry, so the correct option is (a).

4. Which of the following is not a unit of inductance? A. H B. Henry C. F D. kgm2s-2A2

F(Faraday) is not the unit of inductance while all other units represent the unit of inductance.

5. Mention the unit of induction.

The unit of inductance is equivalent to Henries(H)

6. What are the types of inductors?

Iron-core inductor, laminated core inductors, powdered iron core inductors, air-core inductors are some of the types of inductors.

7. Is solenoid inductive?

Yes, solenoids are inductors but not all inductors are solenoids.

8. Which bridge is used to measure inductance?

Maxwell bridge measures inductance.

9. A coil of resistance 10 ohm and inductance 5 henry is connected to a 100V battery. The energy stored in the coil is:


I=V/R=100/10=10A



Energy stored in the coil is:



U=1/2LI2=0.5×5(10)2=250J

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