PHYSICS · Subjective · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
Two separate long solenoids, A and B, are to be compared.
Solenoid A: 600 turns uniformly wound over a length of 0.30 m carrying a current of 4.0 A.
Solenoid B: 900 turns uniformly wound over a length of 0.45 m carrying an unknown current IB.
(i) Derive an expression for the ratio BBBA in terms of the respective numbers of turns, lengths, and currents.
(ii) Using the above data, calculate the magnetic field inside solenoid A.
(iii) Determine the current IB that must flow through solenoid B so that it produces the same magnetic field as solenoid A.
(iv) If both solenoids are operated at the same current of 4.0 A, find the ratio BBBA of their magnetic fields.