The BH curve for a ferromagnetic material is shown in the figure. The material is placed inside a long solenoid which contains 1000 turns/ cm. The current that should be passed in the solenoid to demagnetize the ferromagnet completely is-
A. 1.00 m A(milli ampere)
B. 1.25 mA
C. 1.50 mA
D. 1.75 mA
Answer:B
The BH curve for a ferromagnetic material is shown in the figure. The material is placed inside a long solenoid which contains 1000 turns/ cm. The current that should be passed in the solenoid to demagnetize the ferromagnet completely is-
A. 1.00 m A(milli ampere) B. 1.25 mA C. 1.50 mA D. 1.75 mA