An electron (charge -e) orbits with speed 2 × 106 [m/s] around a central proton (charge +e, along a circular trajectory with radius 5 × 10-¹1 [m]. If the electron lies on the xy plane, and if the electron moves in a counterclockwise fashion as seen from the top, what is the magnetic field at the location of the proton? ○ A. -6.4 × 10-¹⁰ [T] Â OB. 12.8 [T] K ○ C. 6.4 × 10-¹⁰ [T] D. -12.8 T k

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An electron (charge -e) orbits with speed 2 × 106 [m/s] around a
central proton (charge +e, along a circular trajectory with radius 5 x 10-¹1 [m]. If the electron lies on the xy
plane, and if the electron moves in a counterclockwise fashion as seen from the top, what is the magnetic field
at the location of the proton?
A.
−6.4 × 10-¹⁰ [T] Î
○ B.
12.8 [T] K
○ C.
6.4 × 10-¹⁰ [T] Â
OD. -12.8 [T] K
Transcribed Image Text:An electron (charge -e) orbits with speed 2 × 106 [m/s] around a central proton (charge +e, along a circular trajectory with radius 5 x 10-¹1 [m]. If the electron lies on the xy plane, and if the electron moves in a counterclockwise fashion as seen from the top, what is the magnetic field at the location of the proton? A. −6.4 × 10-¹⁰ [T] Î ○ B. 12.8 [T] K ○ C. 6.4 × 10-¹⁰ [T] Â OD. -12.8 [T] K
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