Imagine that you are sitting in achamber with you back to one wall. An electron beam , movinghorizontlly from back wall towards the front wall , is deflected by a stong magnetic fieldtoyourright side. What is thedirectionof magneticfield ?

Imagine that you are sitting in achamber with you back to one wall. An

1.	Imagine that you are sitting in achamber with you back to one wall. An electron beam , movinghorizontlly from back wall towards the front wall , is deflected by a stong magnetic fieldtoyourright side. What is thedirectionof magneticfield ?
Answer» Solution : For reference , see figure (a) and (b) . Thedirectionof the conventional CURRENTIS oppositeto thedirectionof motionofthe ELECTRON . ApplyingFleming.s LEFT - hand RULE , we find that when the MIDDLE fingerpoints in the direction of thecurrent and the thumb points in the direction of the force ,the forefinger points downward givingthe direction of themagneticfield .