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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.

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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 × 10<sup>7</sup> ms<sup>-1</sup>? Earth’s radius is 6.4 × 10<sup>6</sup> m.






 
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