Questions
The coefficient of self-inductance of a solenoid is 0.18 mH. If a core of soft iron of relative permeability 900 is inserted, then the coefficient of self-inductance will become nearly
detailed solution
Correct option is B
L∝μ⇒L2L1=μμ0 (n and i are same)⇒L2=μrL1=900×0.18=162mHTalk to our academic expert!
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