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Q.

Self inductance coefficient of a system can be increased by
a) increasing the current through it
b) decreasing the current through it
c) inserting an iron core
d) increasing the number of turns

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a

a, c, d

b

c, d only

c

a, c only

d

d only

answer is B.

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Detailed Solution

L=μ0μrn2Al=μ0μrN2Al

L∝μr ; L∝N2

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