Definition
A method of producing heat by passing electric current through a conductor that resists the flow of electrons, converting electrical energy into thermal energy. In aircraft anti-icing and deicing systems, embedded heating elements are energized to warm critical surfaces such as propeller blades, pitot tubes, stall warning vanes, windshields, and in some aircraft, wing and tail leading edges.
Plain English
Heat made by running electricity through a wire or element that resists the current. The resistance causes the element to get hot, and that heat is used to keep ice from forming on parts of the aircraft, or to melt ice that has already formed.
Context Anchor
Seen in discussions of aircraft anti-icing and deicing equipment, especially for parts that need direct heat during cold or icing conditions.
Derivation
From the physics term 'resistance' (Latin resistere, 'to stand against'), describing how a material opposes the flow of electric current. That opposition releases energy as heat, which is why the same principle warms a household toaster or hairdryer.
Why Pilots Care
It supplies continuous, on-demand heat without fluids or moving parts, giving reliable protection in known icing conditions while adding minimal weight and complexity.
Analogy
A toaster uses the same basic idea: electricity passes through a material that resists the flow, and the material gets hot. On an airplane, that heat is directed to a part that needs ice protection.
Grounding Statement
When the system is switched on, electricity is turned into heat at the protected part of the airplane.
Intuition Check
Resistance here does not mean a part is resisting ice directly. It means the heating material resists electric current, and that resistance creates heat.
Example Sentence 1
Before takeoff into known icing, the pilot turned on pitot heat and verified the propeller deice ammeter showed current flow, confirming the electrical resistance heating elements were drawing power.
Example Sentence 2
Electrical resistance heating kept the windshield clear during the descent through freezing drizzle.