The coercivity of a small magnet where the ferromagnet gets demagnetized is 3×103 Am−1 . The current required to be passed in a solenoid of length 10 cm and number of turns 100, so that the magnet gets demagnetized when inside the solenoid, is:
a. 30 mA
b. 60 mA
c. 3 A
d. 6 A