A wire is wound around one leg of a square- shaped infinitely permeable core with a cross sectional area Ac = 4 cm2 and an air gap of length g= 3 mm forming a solenoid with a number of turns N = 150 turns. The magnetic field inside such a solenoid is axially directed and essentially uniform. The magnetic field outside the solenoid can be negligible. Is this a force-producing or torque-producing device? Calculate the axial pressure in N/m2 trying to close the air gap for constant coil current | = 1.5 A. %3D

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A wire is wound around one leg of a square-
shaped infinitely permeable core with a
cross sectional area Ac = 4 cm2 and an air
gap of length g= 3 mm forming a solenoid
with a number of turns N = 150 turns. The
magnetic field inside such a solenoid is
axially directed and essentially uniform. The
magnetic field outside the solenoid can be
negligible.
Is this a force-producing or torque-producing device?
Calculate the axial pressure in N/m2 trying to close the
air gap for constant coil current | = 1.5 A.
%3D
Transcribed Image Text:A wire is wound around one leg of a square- shaped infinitely permeable core with a cross sectional area Ac = 4 cm2 and an air gap of length g= 3 mm forming a solenoid with a number of turns N = 150 turns. The magnetic field inside such a solenoid is axially directed and essentially uniform. The magnetic field outside the solenoid can be negligible. Is this a force-producing or torque-producing device? Calculate the axial pressure in N/m2 trying to close the air gap for constant coil current | = 1.5 A. %3D
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