(a) Derive the expression for force per unit length between two long straight parallel current c....

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(a) Derive the expression for force per unit length between two long straight parallel current carrying conductors. Hence, define one ampere.\n(b)A bar magnet of magnetic moment lies aligned with the direction of a uniform magnetic field of 0.22 T .(i) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment, normal to the field direction and opposite to the field direction? πŸ“² PW App Link - https://bit.ly/YTAI_PWAP 🌐 PW Website - https://www.pw.live/



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