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When a beam of electrons passes through an electrostatic field of `300 V cm^(-1)` at right angles to the direction of field, it describes a circular path of radius `8 cm`. On entering the magnetic field of `15` oersted at right angles to the electrostatic field, the beam remains undeflected. Find specific charge of the electron.

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The correct Answer is:
`1.67 xx 10^(11) C kg^(-1)`
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