A transformer (Fig. (A)) is a static device that consists of two or more stationary electric circuits interlinked by a common magnetic circuit to transfer electric energy between them. The transfer of energy from one circuit to another takes place without a change in frequency. What are Step-up and Step-down Transformers? This is a very […]


Fuse: It is a device used in circuit for protecting electrical equipment against overloads and/or short circuits. As we can see in Fig.(A) when high current flows through the system then heat produced melts the wire of fuse and thereby open the circuit. If “I” (current) flows through fuse wire HEAT PRODUCED = (I2 *R)*T […]