Why a current carrying conductor is placed perpendicular to the magnetic field and not parallel?

							
In perpendicular direction- It will experience maximum force 
In parallel direction – The force will be zero because the magnetic lines of force and conductor are parallel.
						

							In perpendicular direction maximum field lines will pass through it whereas in parallel direction least number of lines will pass through it
						

							When conductor is placed perpendicular , the magnetic field line travelling parallely will be maximum in contact with conductor due to large surface area but during parallel position it`s surface area is minimum.
						

							
When a conductor carrying a current is placed in a magnetic field, the conductor experiences a magnetic force.
	
The direction of this force is always right angles to the plane containing both the conductor and the magnetic field, and is predicted by Fleming’s Left-Hand Rule.
Referring to the diagram above, F is Force, B is Magnetic field, I is current.
Factors affecting magnetic force on a current-carrying conductor in a magnetic field:
	
Strength of the magnetic field
	
Current flowing through the wire
	
Length of the wire
F=BIlsinθ, where
	
F is force acting on a current carrying conductor,B is magnetic flux density (magnetic field strength),
	
I is magnitude of current flowing through the conductor, 
	
l is length of conductor,
	
θ is angle that conductor makes with the magnetic field.
 
When the conductor is perpendicular to the magnetic field, the force will be maximum. When it is parallel to the magnetic field, the force will be zero.
Hope it helped!