8/19/2019 Inductor Problems

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1. Determine the emf induced in a coil of 300turns when there is a change of flux of 45

m webs linking with it in 70ms.

2. A flux of 400mebs !assing through a 250turns coil is re"ersed in #0 ms$ %ind the

a"erage emf induced

3. An emf of2.5k& is induced in a coil when a current of #A colla!ses uniforml' to (ero

in 10us$ Determine the inductance of the coil.

4. )alculate the emf induced in a coil of inductance 20* b' a current changing at the

rate of # A+s

5. An 100m* inductor has a current of #A flowing through it how much energ' is

stored in the magnetic field of the inductor,

#. A flux of 25mwebs links with a 1200 turns coil when a current of #A !asses through

the coil calculate the following

i- the inductance of the coil

ii- energ' stored

iii- A"erage emf induced if the current falls to (ero in 250ms

7. )alculate the coil inductance when a current of A in a coil of /00 turns !roduces a flux of

mebs linking with the coil.

8.