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7 October, 17:56

Consider a 50-turn circular loop with a radius of 1.75 cm in a 0.25-T magnetic field. This coil is going to be used in a galvanometer that reads 65 for a full-scale deflection. Such devices use spiral springs which obey an angular form of Hooke's law, where the restoring torque is Here x is the torque constant and? is the angular displacement, in radians, of the spiral spring from equilibrium, where the magnetic field and the normal to the loop are parallel? 50%

Part (a) Calculate the maximum torque, in newton meters, on the loop when the full-scale current flows in it

Part (b) What is the torque constant of the spring, in newton meters per radian, that must be used in this device?

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