6.17 describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides

6.17 describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides

A transformer is a device that helps to reduce or increase voltage in a wire or electric line. This is made of two soft iron core linking to the coils at the two end of the transformer. The first coil is called the primary coil and the second one is called the secondary coil. When alternating current is passed through a coil, the magnetic field around it is continuously changing. The changing magnetic field will pass through the secondary coil and induce voltage in it, and that’s how current is passed. If the secondary coil has more turns, the voltage will increase and if the secondary coil has less turns, the voltage will decrease.