Electromagnetic Induction Lab Report
University Electromagnetic Induction
This report is a description of a lab experiment whose aim is to explore the influence of the number of coils on the strength of an electromagnet. The target is to find out whether the magnetism increases with the alteration of the number of turns in an electromagnetic coil.
Electromagnetism is the transformation of electrical current into a magnet, which is in turn induced into a ferromagnetic materials, causing them to behave in similar manner as magnets. The only difference between electromagnets and permanent magnets is that the former loses its magnetic properties while the latter retains them. It is common knowledge of basic physics that electricity is …show more content…
He made the observation that current has the capability to produce magnetic fields, in 1820, which opened up the field of electromagnetism, for other European physicists. Current moving in a particular direction in a single wire produces concentric magnetic fields in accordance with the Oersted’s law, which is popularly referred to as the right hand rule. The magnetic field’s direction at a point is determined by this rule, which states that, “If the right hand is wrapped around the wire so the thumb points in the direction of the current, the fingers will curl around the wire in the direction of the magnetic field” (Serway & Vuille, 2014). The law is summarized in a vector form as below (It is referred to as the Ampere’s …show more content…
A coil of such nature is referred to as a solenoid. The magnetism is normally strengthened by concentrating it in a ferromagnetic material such as iron core, to form an electromagnet. Within the solenoid, the magnetic fields are close together, forming a uniform field, while outside, the loops diverge and re-connect with those in the coil. The direction of the magnetic field can be determined by the application of Maxwell’s Right Hand Grip Rule: “Assume that the current carrying conductor is held in right hand, so that the fingers wrap around the conductor and the thumb is stretched. If the thumb is along the direction of current, wrapped fingers will show the direction of circular magnetic field lines” (Daware, 2016). Its direction can also be determined by the Right Handed Cork Screw Rule, “If a right handed cork screw is assumed to be held along the conductor, and screw is rotated such that it moves in the direction of the current, direction of magnetic field is same as that of the rotation of screw” (Daware,