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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A small, circular ring is inside a larger loop that is connected to a battery and a switch as shown in Fig. 3.25. Use Lenz’s law to find the direction of the current induced in the small ring (a) just after switch S is closed, (b) after Shas been closed for a long time, ( c) just after S has been reopened after being closed for a long time.

A small, circular ring is inside a larger loop that is connected to a battery and a switch as shown in Fig. 3.25. Use Lenz’s law to find the direction of the current induced in the small ring (a) just after switch S is closed, (b) after Shas been closed for a long time, ( c) just after S has been reopened after being closed for a long time.

A small is so that the magnet gets demagnetized when inside the solenoid The coercitivity of a small magnet where the ferromagnet gets demagnetized is 3× 10^3 A/m. The current required to be passed in a solenoid of length 10cm and number of turns 100 Using Lenz's law