Explain why an SCR is superior to a series rheostat for controlling and limiting current through a load.
- Anonymous1 decade agoFavorite Answer
An SCR is a type of rectifier, controlled by a logic gate signal. It is a four-layer, three-terminal device. A p-type layer acts as an anode and an n-type layer as a cathode; the p-type layer closer to the n-type(cathode) acts as a gate.