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If a deuteron enters a magnetic field of...

If a deuteron enters a magnetic field of 1 `Wb.m^(-2)` at right angles to it, what should be the time period of its revolution?
[masss of the deuteron `=3.3xx10^(-27)kg` and charge = `1.6xx10^(-19)C`

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`1.3xx10^(-7)s`
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