What type of resistors can conduct either heavy or light amounts of current?

The concept behind resistors is based on their ability to resist the flow of electric current. Fixed resistors are designed to have a predetermined resistance value that does not change. This means they can be appropriately rated to handle various levels of current flow, whether heavy or light, depending on their specifications and applications. Their resistance is constant and is chosen based on the circuit requirements, allowing them to safely conduct current within their designated limits.

The other types of resistors address different needs. Variable resistors allow for the adjustment of their resistance; however, they are not typically defined by the amount of current they can handle but rather their functionality of changing resistance. Fuse resistors are incorporated into circuits mainly for protection; they act as a safety device and are designed to open a circuit when a specific threshold of current is exceeded. Super resistors, while not a standard term within the context of electronics, generally do not refer to devices specifically made for handling varying current levels.