©theexper L-

In the figure below, a long circular pipe with outside radius R=2.18 cm carries a (uniformly distributed) current i = 9.57 mA into the page. A wire runs parallel to the pipe at a distance of 3.00R from center to center. Find the (a) magnitude and (b) direction (into or out of the page) of the current in the wire such that the ratio of the magnitude of the net magnetic field at point P to the magnitude of the net magnetic field at the center of the pipe is 4.85, but it has the opposite direction. Wire O (a) Number (b) Units P. R R R Pipe

A charge of 1.2 C having an initial velocity of = 3.91+3.3 m/s enters a region with an electric field È = 3.1î N/C and a magnetic field B = 3.71+4.2k T. Calculate the magnitude of the force on the charge immediately after it enters the region. Express your answer in Newtons (write just the value, not the unit), rounding to one digit after the decimal separator. Add your answer Continue

Problem 2: An electric current I = 0.55 A is traveling in a circular wire with radius R = 0.055 m. ds Part (a) Express the magnetic field vector B generated at the center O in terms of the current I, the radius vector R, and the length element vector ds. SchematicChoice : Rx ds ds x R В 4 ds x R 4T B = - %3D = - R3 R3 HọI R3 R3 ds x R B HọI Rx ds B= - В - ds x R R3 R3 Part (b) What's the direction of the magnetic field at point 0? MultipleChoice : 1) Upward. 2) Out of the screen. 3) To the left. 4) To the right. 5) Downward. 6) Into the screen. Part (c) Express the magnitude of the magnetic field at point O in terms of I and R. Expression : |B| = Select from the variables below to write your expression. Note that all variables may not be required. a, B, µo, T, 0, a, b, c, d, e, g, h, I, j, k, m, P, R, S, t Part (d) Calculate the numerical value of B, in tesla. Numeric : A numeric value is expected and not an expression. |B| =