What happens to the force acting on a current-carrying conductorplaced in amagnetic field when : a] current in conductorincreases ?b]length oftheconductor increases ?c] direction of the currentand magnetic fieldare reversed ?d] direction of thecurrent is reversed without changing thedirection of magneticfield ?

What happens to the force acting on a current-carrying conductorplaced

1.	What happens to the force acting on a current-carrying conductorplaced in amagnetic field when : a] current in conductorincreases ?b]length oftheconductor increases ?c] direction of the currentand magnetic fieldare reversed ?d] direction of thecurrent is reversed without changing thedirection of magneticfield ?
Answer» Solution :a] The deflection of the compass needle increases because of the increase in the strength of the magnetic FIELD [B `prop` l] b] The DIRECTION of deflection of the compass needle is reversed because the direction ofmagneticfield is reversed. c] The deflection on the compass needle decreasesdue to the decrease in the strengthof the magnetic field [B `prop` 1/r].