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Which of the following statements about fourth Anglo - Mysore War are correct ? 1. The Madras Council suggested a policy of rigorous and intense attack on mysore . 2. Lord Wellsley tried to revive the Triple Alliance . 3.Tipu sent emissaries to Arabia versailles , Mauritius and Kabul enlisting support against the English . 4. The war was of a very short duration though decisive.

A uniform constant magnetic field B is directed at an angle of 45^(@) to the x axis in the xy - plane . PQRS is a rigid, square wire frame carrying a steady current I_(0) , with its centre at the origin O . At time t = 0 , the frame is at rest in the position as shown in figure , with its sides parallel to the x and y axis. Each side of the frame is of mass M and length L . (a) What is the torque tau about O acting on the frame due to the magnetic field? (b) Find the angle by which the frame rotates under the action of this torque in a short interval of time Deltat , and the axis about this rotation occurs . ( Deltat is so short that any variation in the torque during this interval may be neglected .) Given : the moment of interia of the frame about an axis through its centre perpendicular to its about an axis through its centre perpendicular to its plane is (4)/(3) ML^(2) .