A positivelycharges particle (alpha particle) projected towards west is deflected towards north by a magneticfield . The directionof magneticfield is ……

A positivelycharges particle (alpha particle) projected towards west i

1.	A positivelycharges particle (alpha particle) projected towards west is deflected towards north by a magneticfield . The directionof magneticfield is ……
Answer» towards south towardseast downward upward Solution :Here the positivelycharged particle (alpha particle ) is initially movingtowardsthe west . The deflection of alphaparticleis towards north . This showsthatthe magneticforceacts on it towards the north (direction). Hence , here (a) direction of current I istowards west and (b) direction of force F istowards north . letus nowhold the first (force) finger ,middle fingerand THUMB ofyour LEFT hand at right angles to oneanother . Adjust the left hand in sucha way that your middlefingerpoint towards the west( in the directionof the current ) andthe thumb pointstowards the north ( in the directionof the force). Inthis case , your first(force) fingerpoints UPWARDS (shown by the symbol ). Sincethe directionof the forefinger gives the direction of themagneticfield ,the magneticfield WOULD be in the upward direction .[see figure 13.23(a) or 13.23 (b)].