= A rigid square coil of side a = 20cmis crossed by a current/ 2Aand is placed in a magnetic field of magnitude B = 0.03 T whose direction forms an angle $ $\vartheta=30\circ$$ with the normal on the plane where the coil lies. Determine the modulus of the t orque M acting on the ring. O (to)M 1.2.10-³Nm

= A rigid square coil of side a = 20cmis crossed by a current/ 2Aand is placed in a magnetic field of magnitude B = 0.03 T whose direction forms an angle $ $\vartheta=30\circ$$ with the normal on the plane where the coil lies. Determine the modulus of the t orque M acting on the ring. O (to)M 1.2.10-³Nm