the deflecting torque on an instrument corresponding to a deflection of 90⁰ is 1.2x10⁴kgm. The control is exerted through a phosphor bronze spring, The allowable maximum stress is 5.5x10⁶kg per m² and the Young's modulus of spring material is 1.15x10¹⁰kg per m², calculate the suitable dimension for the spring ( hint: assume the width of spring as 0.75mm).
