(a) List four factors on which the magnitude of magnetic force acting on a moving charge in a magnetic field depend. (b)How will a fine beam of electrons streaming in west to east direction be affected by a magnetic field directed vertically upwards ? Explain with the help of a diagram mentioning the rule applied.

(a) List four factors on which the magnitude of magnetic force acting

1.	(a) List four factors on which the magnitude of magnetic force acting on a moving charge in a magnetic field depend. (b)How will a fine beam of electrons streaming in west to east direction be affected by a magnetic field directed vertically upwards ? Explain with the help of a diagram mentioning the rule applied.
Answer» Solution :(a) MAGNITUDE of magnetic force acting on a moving charge in a magnetic field depends on (i) the magnitude of charge, (ii) speed of moving charge, (ii) strength of magnetic field, and (IV) the angle between the direction of motion of charge and the direction of magnetic field. (b)The electron streamingfrom west to eastis equivlaenttoa currentfrom east to west . Themagnetic fieldB is vertically upwards and shown by cross mark(x). HENCE, in accordancewith Fleming .s LEFT hand rule ,the electron will experienceforce in north directionand deflected in that direction .