Part A A circular loop has radius Rand carries current I, in a clockwise direction (the figure (Figure 1)). The center of the loop is a distance D above a long, straight wire. What is the magnitude of the current I in the wire if the magnetic field at the center of the loop is zero? Express your answer in terms of the variables I2, R, D, and appropriate constants (µo and 7). = Figure < 1 of 1 > Submit Request Answer Part B What is the direction of the current I? O The current I must point to the left. O The current I must point to the right. Submit Request Answer

Part A A circular loop has radius Rand carries current I, in a clockwise direction (the figure (Figure 1)). The center of the loop is a distance D above a long, straight wire. What is the magnitude of the current I in the wire if the magnetic field at the center of the loop is zero? Express your answer in terms of the variables I2, R, D, and appropriate constants (µo and 7). = Figure < 1 of 1 > Submit Request Answer Part B What is the direction of the current I? O The current I must point to the left. O The current I must point to the right. Submit Request Answer