An electric current I=0.75 A is flowing in an infinitely long wire. Randomized Variables I=0.75 A 33% Part (a) Write an equation for the magnetic field vector B generated by the current at an arbitrary point in terms of I, the length element dl, and the vector for the distance R from dl to the point. Hol B 4 dl x R R3 Hol B = 4 dl x R B R3 Hol 4 ES: R3 dl x R 4 Rx dl Hol Rx dl 4T dl x R B = B = B = Hol R3 4 R3 Hol R3 Submit Feedback 1 give up! Hints: Feedback: 33% Part (b) If the distance from point A to the wire is a as in the figure, write an equation for the magnitude of the magnetic field B generated by the curren at A in terms of I and a. 33% Part (c) If a 0.015 m, calculate the numerical value of B in tesla.