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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two coxial solenoid 1 and 2 of the same length are set so that one is inside the otrher. The number of turns per unit length are n1 and n2. The currents i1 and u2 are flowing in opposite directions. the magnetic field inside the inner coil is zero. This is possible when

Two coxial solenoid 1 and 2 of the same length are set so that one is inside the otrher. The number of turns per unit length are n1 and n2. The currents i1 and u2 are flowing in opposite directions. the magnetic field inside the inner coil is zero. This is possible when

A winding wire which is used to frame a solenoid can bear a maximum 10 A. current If length of solenoid is 80 cm and its cross sectional radius is 3 cm then required length of winding wire is (B =0.2T)