Consider the circuit in the figure (b). The curved segments are arcs of circles

Question

Consider the circuit in the figure (b). The curved segments are arcs of circles of angle 15o and radii a = 14 cm and b = 7 cm. The straight segments are along radii. Find the magnetic field B at point P ( the center of curvature), assuming a current of 14 A clockwise in the circuit. (Positive out of page and negative into page)

some of my previous answers that were wrong:

2.11x10 ^-5 2 Incorrect. (Try 1) 2.11x10 ^-5 T 3 Incorrect. (Try 2) -2.11x10 ^-5 T 4 Incorrect. (Try 3) 8.21x10^-6 T 5 Incorrect. (Try 4) 8.21x10^-7 T 6 Incorrect. (Try 5) 8.33x10^-7 T Consider the circuit in the figure (b). The curved segments are arcs of circles of angle 15o and radii a = 14 cm and b = 7 cm. The straight segments are along radii. Find the magnetic field B at point P ( the center of curvature), assuming a current of 14 A clockwise in the circuit. (Positive out of page and negative into page) some of my previous answers that were wrong: 2.11x10 ^-5 2 Incorrect. (Try 1) 2.11x10 ^-5 T 3 Incorrect. (Try 2) -2.11x10 ^-5 T 4 Incorrect. (Try 3) 8.21x10^-6 T 5 Incorrect. (Try 4) 8.21x10^-7 T 6 Incorrect. (Try 5) 8.33x10^-7 T

Explanation / Answer

magnetic field due to such an arrangement of wires is givne by

B = (uo i theta/4)(1/a -1/b)

B = (4pi e-7 * 14 * 15 * 2pi/360)/4* (1/0.07-1/0.14)

B = - 8.21 *10^-6 Tesla

dont forget ti include -ve sing with the answer

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