(Solved): 4. A loop has a form of a circle of radius r and it consists of N turns of wire. The resistance of ...

4. A loop has a form of a circle of radius r and it consists of N turns of wire. The resistance of the wire is R. Magnetic field B is initially directed in the loop's plane. Then the loop is rotated during the time At by the angle 0 around the axis in its plane that is perpendicular to the magnetic field. What is the average EMF in the circuit? What is the average current? What is the charge Q that goes through the loop? What work W should be done to rotate the loop? Calculate the numerical value of W for a = 20 cm, N= 100, R = 10 Q2, B = 1.5 mT, 0= 40°, At = 0.15 s. Do not calculate numerically any other quantities.