Question

(a) A positively charged particle (alpha) projected towards west is deflected towards north by a magnetic field. State the direction of magnetic field. State the rule used by you to find the direction. (b) Mention the factors on which the strength of forces experienced by a current carrying conductor placed in a magnetic field depend. (c) Under what condition is the force experienced by a current carrying conductor placed in a magnetic field maximum?

Answer 1

As the direction of current is towards west and force is towards north so by Flemming’s Left Hand Rule, the direction of magnetic field is upward. The rule used is Flemming’s Left Hand Rule which states that if we strech our thumb, forefinger, and middle finger of our left hand perpendicular to each other in such a way that fore finger points the direction of magnetic field and middle finger points the direction of current then thumb will represent the direction of force. (b)Force on the current carry conductor = F= BIL so it depends on the strength of magnetic field, current flowing through conductor and length of the conductor. (c) A current carrying conductor placed perpendicular to the magnetic field will experience maximum force.

Answer 2

a)Here the direction of positively chargedalpha particle is towards west this implies the direction of current is alsotowards west and the direction of magnetic force is towards north. Hence, according to Fleming's left hand rule, thedirection of magnetic field will be upwards.