Magnetic Field Flashcards
Ampere law .Determine the magnetic field intensity at any point due to straight conductor.
the integral of magnetic flux density is equal to the miu nod times net current bounded by the area of that closed surface.
Biot Savart law
the magnetic field intensity is propotional to the length of the current element,current passing through it sine angle and inverselt propotional to the square of distance of the point from the element.
One ampere.
defined as the current gained when passing through 2 long infinitely parallel conductor having 1 m distance from each other in vaccum which produces 2*10^-7 N per unit length between the conductors.
Flemings left hand rule.
thumb shows the force , fore finger shows the direction of the magnetic field and middle finger shows the direction of current.
Vector representation of lorentz force
F vector=q(v vector + B vector)
Why are the pole pieces of magnet cut into cylindrical form in a galvanometer?
The cylindrical form of the pole pieces helps to create a uniform magnetic field and improves the efficiency of the magnet.
explain why a current carrying solenoid tends to contract .
A current-carrying solenoid creates a magnetic field. The loops attract each other due to the current, pulling inward. This makes the solenoid want to contract along its length.
