Inductance in Electric Circuits
Dr. R. R. Mistry, M.Sc., Ph.D., explains the concepts of self-inductance and mutual inductance in electric circuits. Self-induction refers to the production of induced e.m.f. due to a change in current within a circuit, while mutual induction involves induced e.m.f. in neighboring circuits. Explore the relationship between magnetic flux, current flow, and induced e.m.f. through insightful explanations and accompanying visuals.
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Presentation Transcript
Dr. R. R. Mistry M.Sc. (Physics), SET, Ph.D. Assistant Professor
Self Inductance:- Whenever the electric current flowing through a circuit changes, the magnetic flux linked with that circuit also changes. As the result an induced e.m.f. is set up in the circuit. According to Lenz s law the direction of induced e.m.f. is such as to opposite to change the current.
Definition:- production of an induced e. m. f. in a circuit itself due to the change in current through it is called self induction and the induced e. m. f. is called back e. m. f. The phenomenon of the
The magnetic flux linked with the circuit at any instant is proportional to the current I flowing through the same circuit at that instant.
Mutual Inductance:- Consider two coil C1& C2. If a current I is made in the coil C1then during the time of make a induced e.m.f. is set up in coil C2. When the current in coil C1reaches a steady value thee.m.f. induced in coil C2is zero.
Definition:- Whenever the current flowing through a circuit changes, the magnetic flux linked with the neighbouring circuit also changes. Hence an induced e.m.f. is set up in the neighbouring phenomenon is called mutual induction. The magnetic flux 2linked with circuit C2 is proportional to the current i1flowing in circuit C1i.e. circuit. This
If the current changes I2 in the coil C2changes with time, then the flux linked with the coil C1 also changes and so an e. m. f. 1is induced in thecircuit C1which is given by
