PROBLEMS Instructions: Read these instructions. READ THE PROBLEM CAREFULLY. Show your work. Give answers to three significant figures. Box your answer. Constants are on the equation sheet. (21) 14. A negatively charged particle is moving with a velocity v in a magnetic field as shown. a) [6] Show the direction of force (no perspective drawings) and b) [12] calculate the magnitude of the force for the Values: B = 0.65 mT 9 =-7e X (X X v = 7.43 x 10' m/s X) 0 = 260 m = 14 u B X X X X X SO..... (X X X X c) [6] Sketch he trajectory of the particle from this point. d) [3] Calculate the radius of gyration. 1 ) 1 15. A long straight wire carries a current I out of the page. a) [6] Show the magnetic field lines for I. b) [3] Sketch the magnetic field vector at point P due this current. P 30 c) [6] The wire has current of 3.75 A and P is 1.45 cm away. Find the magnitude of the magnetic field at P. d) [6] Now a wire carrying a second current of 2.50 A is placed at P going into the page. Find the force per unit length on this wire. Show it on the diagram