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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Using Lenz’s law, determine the direction of the current in resistor ab in Fig. 3.23 when (a) switch S is opended after having been closed for several minutes. (b) coil B is brought closer to coil A with the swich closed. ltbr. ( c) the resistance of R is decreased while the switch remains closed

Using Lenz’s law, determine the direction of the current in resistor ab in Fig. 3.23 when (a) switch S is opended after having been closed for several minutes. (b) coil B is brought closer to coil A with the swich closed. ltbr. ( c) the resistance of R is decreased while the switch remains closed

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