Question

Need help with this problem, its not fcostheta

The force on a wire is a maximum of 4.32 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on. If the pole faces have a diameter of 11.5 cm, estimate the current in the wire if the field is 0.140 T. 2.68x102 A You are correct. Your receipt no. is 154-5475 Previous Tries Part B If the wire is tipped so that it now makes an angle of 19.5° with the horizontal, what force will it now feel? 4.067 N Two variables changed due to the tipping. 1. The angle between the current and the magnetic is no longer 90 deg. (Note: It is not 19.5 deg.) 2. The length of the wire in the magnetic field also changed. Use trigonometry to find the length of the wire in the magnetic field. Submit Answer Incorrect. Tries 3/6 Previous Tries

Answer 1

(B) Angle between magnetic field and length of conductor is, 9=90° – 19.5 = 70.5 Magnitude of force experienced by the conductor is, F = BIl sino = (0.14T)(2.68x10²A)(11.5*10-4 m) sin(70.5") = 4.0673N * 4.07 N * (or) 4.07e*UN ->Three significant figures.