Magnetic effect of electric current. Field is effect or characteristics in space due to which an object experience a force. Field is a force without direct contact. The Imaginary lines of force is magnetic field lines. Imaginary lines of force go from north pole to south pole.
Characteristics of magnetic field lines are the magnetic field lines are imaginary, smooth, stretched, continuous lines. At any given point tangent on line shows the direction of field at that point. Concentration of lines shows relative strength. No two lines intersect each other because at one point there cannot be two directions of one force.
An electric current can create a magnetic field. Electric current means motion of charge particle. Magnetic field is created by electric current and not by electric charge. Let the current flowing in a conductor in upwards direction note this direction of current is conventional direction of current. Due to this current there will be magnetic field lines. This magnetic field lines are in circular direction. These magnetic field lines are closed loops. By using right hand thumb rule or it is also called as right hand curl rule we can find the direction of magnetic field if we know the direction of current. Thumb shows direction of current and finger curl shows direction of magnetic field.
Applications of magnetic effect of electric current are in bullet train, generator, medical devices like MRI machine electric bell, crane lifting iron junk etc.
Effects of electric current are heating effect, magnetic effect and chemical effect.