Question

An electron beam is moving vertically downwards if it passes through a magnetic field that is directed from South to North in a horizontal plane then in which direction the Bhim will be deflected

Answer 1

For solving this we should use left hand thumb rule I. E forefinger is magnetic field. Middle finger is current. And thumb is force

So, given, magnetic field is from north to south and electron is moving downward but here we should consider conventional direction I. E up wards so, by applying left hand thumb rule we get beam get deflated to wards east

Hope u got ur answer.......

Answer 2

For this question we will use fleming left hand rule

Electron is moving upward Therefore current is towards downward

So middle finger will be point towards ur feet

Now, as magnetic field is from south to north therefore 1 finger will point towards north

And by this we will get the direction of deflection by thumb directing towards force.

Hence answer is towards east

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