How can resistance heating be increased?

Resistance heating is a phenomenon in which electrical energy is converted into heat energy as it passes through a conductor. The effectiveness of this process depends on several factors, including the physical characteristics of the conductor and how current flows through it.

Choosing the option regarding tightly wound conductors is correct because the configuration and compactness of conductors can significantly enhance resistance heating. When conductors are tightly wound, the length of the current path increases for the same amount of material, resulting in higher resistance. This is due to the fact that resistance is directly related to both the length and cross-sectional area of a conductor, as described by Ohm's Law. The tightly wound configuration can create more surface area for current flow, which can lead to increased resistive heating as the flow of electrical current encounters greater resistance.

Other methods of modifying resistance heating, such as using thicker conductors or adding insulation, do not inherently increase resistance heating. Thicker conductors typically reduce resistance because they provide more cross-sectional area for the flow of electric current, promoting efficiency rather than heating. Adding insulation, on the other hand, can prevent heat loss but does not directly increase resistance heating. Increasing the temperature of the conductor can lead to a higher resistance as well, but this is a secondary effect