What type of transformer increases voltage from primary to secondary?

A transformer that increases voltage from the primary to the secondary is known as a step-up transformer. This type works by having more turns of wire in the secondary coil compared to the primary coil, which results in a higher voltage output. The principle behind its operation is based on electromagnetic induction and the conservation of energy, where the voltage increase corresponds to a decrease in current, assuming no energy losses.

In many electrical applications, step-up transformers are used to elevate voltage levels for efficient transmission over long distances, minimizing power loss. They are essential in power generation and distribution systems to ensure electricity can travel effectively from power plants to end-users.

Other types of transformers serve different purposes, such as step-down transformers, which lower voltage, isolation transformers, which provide electrical isolation without changing voltage, and variable transformers, which allow for adjustable output voltage. Each serves a specific function in electrical systems, but only the step-up transformer is designed explicitly to increase voltage from the primary to secondary side.