two short solenoid each of radius 10 centimetre length 20cm and 30 turns/cm are arranged coaxially with a gap of 6 m. calculate the magnetic field at the middle of the gap when one ampere current pass through the solenoid in series.
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Explanation:
Calculate the dipole moment Pof each solenoid when the given current passes through them.
Then calculate the magnetic field B due to a dipole P at a 3m from it on its axis.
The magnetic field due to another solenoid will be the same B in same direction. so they add up to give total 2B magnetic field.
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