Inductance
CHAPTER 55 Inductance
5.1 Origin of Inductance
To understand the concept of Inductance we will first understand the magnetic field generated by a current. Consider a section of wire carrying a current I. Every wire carrying a current generates a magnetic field around it.
Figure 5 1 - Magnetic Field around a current carrying wire.
The direction of this magnetic field is given by the right hand rule. The right hand rule says that if we point the thumb in the direction of the current, then the curling fingers point in the direction of the generated magnetic field.
The magnitude of the magnetic field depends upon several factors. It is directly proportional to the current being carried in the wire. Doubling the current doubles the magnetic field. It depends upon the length of the section of the wire. A longer wire will generate more magnetic field.
The strength of the magnetic field is given by Biot Savart law.
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