Where is silicon carbide igniter used?

• A. Hot surface
• B. Induction motor
• C. Fluorescent lamp
• D. Spark plug

Answer: (A)

Silicon carbide igniters are used as hot surface ignition elements. They work by heating up to a high temperature so the glowing surface can ignite the gas–air mixture in gas-fired equipment. Silicon carbide is ideal for this role because it handles very high temperatures, converts electrical energy efficiently into heat, and withstands repeated heating and cooling cycles without degrading. That combination makes it a reliable ignition method for furnaces, ovens, and other gas appliances that use a hot, glowing surface to start combustion.

This isn’t how induction motors operate, which rely on electromagnetic induction to create motion. It isn’t how fluorescent lamps start, since those rely on gas discharge and a ballast rather than a heated surface. And it isn’t a spark plug situation, which uses a high-voltage spark across a gap to ignite the mixture. The hot surface approach is the best fit.