A stream of electrons moving with a velo...

A stream of electrons moving with a velocity of `6xx10^(7)ms^(-1)` passes between two parallel plates. An electric field of `3000 Vm^(-1)` is applied between the plates. Calculate the strength of the magnetic field required to keep the electron undeflected.

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The correct Answer is:

`5 xx 10^(-5) T`

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