1) A 375-turns circular loop of radius 24 cm, carries a current of 20 A creates a torque of 280 N m when the plane of the coil makes an angle 40 with the magnetic field. Y ) The strength of the magnetic field in Tesla : (2 marks) ) The potential energy U of the coil in Joule: (2 marks) 2) A proton moves at 4.03x 10 m/s in a 1.179 T magnetic field experiences a magnetic force of 1.75 x10-1N. () What angle does the velocity of the proton make with the magnetic field? : (2 marks) (6) When the proton will feel maximum force (1 mark)