6- A 40.0-cm length of wire carries a current of 20.0 A. It is bent into a loop and placed with its normal perpendicular to a magnetic field with a magnitude of 0.520 T.
What is the torque on the loop if it is bent into
(a) an equilateral triangle?
(b) What If? What is the torque if the loop is (b) a square or (c) a circle? (d)
Which torque is greatest?