Air has a high ______ value so this current flow creates heat.

Air has a high ______ value so this current flow creates heat.

• A. Capacitance
• B. Resistance
• C. Inductance
• D. Reactance

Answer: (B)

Heat from electrical current comes from resistance in the path. As electrons move, they collide with atoms, converting part of the electrical energy into heat. The power converted to heat is P = I^2R, so for a given current, higher resistance produces more heat. Air is a high-resistance, insulating medium, which is why it resists current flow; when current does pass through air (as in a spark or arc), the air’s resistance still generates heat along the path. Capacitance, inductance, and reactance describe energy storage or how a circuit resists changes, but they don’t explain heat generation from steady current the way resistance does.

Heat from electrical current comes from resistance in the path. As electrons move, they collide with atoms, converting part of the electrical energy into heat. The power converted to heat is P = I^2R, so for a given current, higher resistance produces more heat. Air is a high-resistance, insulating medium, which is why it resists current flow; when current does pass through air (as in a spark or arc), the air’s resistance still generates heat along the path. Capacitance, inductance, and reactance describe energy storage or how a circuit resists changes, but they don’t explain heat generation from steady current the way resistance does.