According to the figure, a uniform bar of length L carries a current l in the direction from point"a" to point "b". The bar is in a uniform magnetic field directed toward the page. Consider thetorque about an axis perpendicular to the bar at point "a" produced by the force that themagnetic field exerts on the bar.Based on the above, answer the following questions:a. Calculate the magnetic force on the bar, magnitude, and direction, in terms of the givenquantities.b. Calculate the net torque on the bar about the axis through a and explain how the bar wouldrotate.c. What must the current I be in the bar for it to be in rotational equilibrium when it is at anangle 0 = 30° above the horizontal? If the bar has a mass of 0.0120 kg and is 30 cm long androtates without friction about an axis perpendicular to the bar at point a and is in a uniformmagnetic field directed toward the page and has a magnitude B = 0.150 T. (The gravitationalforce on the bar acts in the -y direction)d. How can the direction of a magnetic field be determined solely from qualitativeobservations of the magnetic force on a straight, current-carrying wire? explain in detailxB xx b xMake drawings for A, B and C

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