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A spring is connected to the end of a ma...

A spring is connected to the end of a magnetic dipole which is pivoted about its midpoint as shown in the fig.The torque exerted on the dipole by the spring can be represented by tau=K theta where K=1N . m rad ^(-1) and theta is a small angle in radian. Under equilibrium the angle theta is - (a) (sqrt(18)-4)rad (d) (b) (sqrt(18)+4)rad (c) 0.62rad (d) (1-(1)/(sqrt(2)))rad

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