engineering recuitment NHPC JE & THDC JE 2023 Mock Test Electromagnetic Theory Magnetostatics

The coefficient of self-inductance of a solenoid is 0.20 mH. If a core of soft iron of relative permeability 900 is inserted, then the coefficient of self-inductance will become nearly

1

5.4 mH

2

180 mH

3

0.006 mH

4

0.0002 mH

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