A flux of 900 \mu {Wb} is produced in the iron core of a solenoid. When core is removed a flux (in air) of 0.5 \mu {Wb} is produced in same solenoid by same current. What is relative permeability of iron?

NEET 2022 Model Paper 1

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A flux of 900µWb is produced in the iron core of a solenoid. When core is removed a flux (in air) of 0.5µWb is produced in same solenoid by same current. What is relative permeability of iron?

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