What should be the minimum magnitude of the magnetic field that must b – McqOptions

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1.	What should be the minimum magnitude of the magnetic field that must be produced at the equator of earth so that a proton may go round the earth with a speed of 1 10⁷ ms^-1? Earth s radius is 6.4 10⁶ m.
A.	16.63 10<sup>-8</sup> T
B.	91.63 10<sup>-8</sup> T
C.	1.63 10<sup>-8</sup> T
D.	761.63 10<sup>-8</sup> T
Answer» D. 761.63 10<sup>-8</sup> T

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