Torque of a current carrying wire in magnetic field

AI Thread Summary
The torque on a current-carrying wire in a magnetic field is not influenced by the wire's own magnetic field because that field does not exert a force on itself. The magnetic field generated by the wire circulates around it and does not interact directly with the wire to produce torque. Consequently, the wire does not experience a force from its own magnetic field. This principle is fundamental in understanding electromagnetic interactions. Overall, the current-carrying wire only responds to external magnetic fields for torque generation.
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For Torque of current carrying wire in magnetic field why does the magnetic field of the current carrying wire itself not contribute to torque?
 
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will the current carrying wire experience a force from the magnetic field it produces?... no right?
 
Correct.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Thread 'Voltmeter readings for this circuit with switches'
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