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
A. 5.4 mH
B. 162 mH
C. 0.006 mH
D. 0.0002 mH
Answer:B
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
A. 5.4 mH B. 162 mH C. 0.006 mH D. 0.0002 mH