An iron-cored solenoid has self- inductance. 2.8 H. When the core is removed, the self inductance becomes 2 mH. What is the relative permeability of the core used?

An iron-cored solenoid has self inductance 2.8 H. When the core is removed, the self inductance become 2mH. What is the relative permeability of the core used?

The self-inductance of an air-core solenoid is 4.8 mH. If its core is replaced by iron core, then its self-inductance becomes 1.8 H. Find out the relative permeability of iron.

Self-inductance of an air core inductor increases from 0.01 mH to 10 mH on introducing an iron core into it. What is the relative permeability of the core used?

If the self-inductance of an iron ore inductor increases from 0.01 m H to 10mH on introducing the iron core into it, what is the relative permeability of the core used?

A solenoid having 100 turns with an area of cross section 10 cm^(2) is 12 cm long. When iron core is introduced in it, the self-inductance increases to 1000 times. Calculate the relative permeability of the core.

Self inductance of an air core inductor increases from 0.01 mH to 10 mH when an iron core is introduced in it. What is the relative permeability of the core ?