Which device converts electrical energy into heat?

Which device converts electrical energy into heat?

• A. Inductor
• B. Diode
• C. Heater
• D. Fuse

Answer: (C)

Electrical energy becomes heat most effectively in devices built to dissipate energy as thermal energy through a resistive element. A heater is designed for that exact purpose: when current flows, the resistive material converts part of the electrical power into heat, with the rate of heat production given by P = I^2R (or P = V^2/R). This direct conversion is why a heater is the best answer. Other components aren’t intended to generate heat as their primary function. An inductor stores energy in a magnetic field and mainly resists changes in current; any heat it produces is incidental (due to losses) rather than its purpose. A diode directs current and converts alternating to direct current; any heat is simply a byproduct of the voltage drop. A fuse protects the circuit by breaking the connection when current is too high, so its role isn’t to generate heat as a useful output.

Electrical energy becomes heat most effectively in devices built to dissipate energy as thermal energy through a resistive element. A heater is designed for that exact purpose: when current flows, the resistive material converts part of the electrical power into heat, with the rate of heat production given by P = I^2R (or P = V^2/R). This direct conversion is why a heater is the best answer.

Other components aren’t intended to generate heat as their primary function. An inductor stores energy in a magnetic field and mainly resists changes in current; any heat it produces is incidental (due to losses) rather than its purpose. A diode directs current and converts alternating to direct current; any heat is simply a byproduct of the voltage drop. A fuse protects the circuit by breaking the connection when current is too high, so its role isn’t to generate heat as a useful output.