Magnetic effect of electric current is one of the major effects which functions as the basic principle in appliances used in various fields of activities. The magnetic field around a current carrying conductor can be depicted by using magnetic field lines which are represented in the form of concentric circles around it. The direction of magnetic field through a current carrying conductor is determined by the direction of flow of electric current. The Right Hand Thumb Rule also known as Maxwell’s Corkscrew Rule is known to determine the direction of magnetic field in relation to direction of electric current through a straight conductor. As the direction of the electric current changes, the direction of the magnetic field also gets reversed. If the direction of electric current in a vertically suspended current carrying conductor is from south to north, the magnetic field will be in the anticlockwise direction. If the current is flowing from north to south, the direction of magnetic field will be clockwise. If a current carrying conductor is held by right hand; keeping the thumb straight and if the direction of electric current is in the direction of thumb, then the direction of folding of other fingers will show the direction of magnetic field. Magnitude of magnetic field is directly proportional to the number of turns of coil. If there are ‘n’ turns of coil, magnitude of magnetic field will be ‘n’ times of magnetic field in case of a single turn of coil.