Soft iron is used to make the core of transformer because

Alternating Current (AC) Transformers by Ron Kurtus (updated 30 May 2023) A transformer is an electric device that is used to change the voltage in alternating current (AC) electric circuits. The ability of this device to change voltage is a major advantage of AC electricity over direct current (DC). A simple transformer consists of a dual electromagnet, where there are two sets of wires wrapped around it for the input and output voltages. The electromagnet may be in the form of a straight iron rod, horseshoe, or donut shaped. The output voltage is a function of the input voltage and the ratio of the number of turns of the wire. Uses for transformers are to decrease the line voltage to house voltage and the change the voltage for small devices. Questions you may have include: • How does the transformer work? • What are the principles of electricity and magnetism involved? • What are some uses of transformers? This lesson will answer those questions. Useful tool: Simple transformer A simple AC transformer is basically a dual electromagnet with two sets of wires wound around it for the input and output voltages. The input AC voltage goes through the primary coil, making the soft iron core and AC electromagnet. Soft iron is used because the direction of magnetism can change rapidly with the change in direction of the current. The strength of the magnetic field is a function of the number of turns of the primary coil. Simple AC transformer The changing magnetic field activates...