Which of the following methods is used for electrical heat production?

Resistance heating is a method that generates heat through the electrical resistance encountered when electrical current flows through a conductor. This principle is rooted in Joule's law, which states that the power of heat generated is proportional to the square of the current multiplied by the resistance of the material. As current flows through a resistor, it encounters opposition, converting electrical energy into thermal energy, which is widely utilized in various applications, such as electric stoves, electric heaters, and toasters.

Other methods mentioned in the options contribute to heat production, but they operate on different principles. Induction heating, for example, uses electromagnetic induction to heat conductive materials and requires the material to be ferromagnetic for effective heating. Capacitive heating involves the application of an electric field to generate heat, but it is less common and typically not classified broadly under electrical heat production. Radiant heating, on the other hand, is primarily a thermal radiation heating method rather than electrical and relies on the emission of infrared radiation to heat spaces.

Therefore, resistance heating stands out as a fundamental and straightforward method for producing heat directly from electrical energy, making it the appropriate choice for this question.