Question

Calculate magnetic energy required to build up the current I in a coil of self inductance L​

Answer 1

Answer:

Self Inductance of a coil is the magnetic flux linked with the coil when the current through coil is IA

ϕ=li where L is the constant of proportionality .

Let a source of emf be connected to an inductor L

With increase in current ,the opposite emf ,e=−L

dt

di

Work done dw=∣e∣idt=Li

dt

di

dt=Lidi

W=∫

0

i

Lidi=

2

1

Li

2

Energy stored in magnetic inductor,U=

2

1

Li

2

Answer 2

now u have started studying but first u were a doctor I think so (+_+)

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