The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be
A. 3 mH
B. 12 mH
C. 24 mH
D. 48 mH
Answer: Option A
This Question Belongs to Electronics And Communications Engineering >> Electromagnetic Induction
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Inductance= (relative permeability * Number of turns Sq. * Area)/ Length
L=uNsq .A/l