The heating effect of electric current is used in which of the following devices?
Q1. The heating effect of electric current is used in which of the following devices?
Answer: Electric heater
Explanation: Electric heaters exploit the heating effect of current (Joule heating), where electrical energy is converted to thermal energy as current flows through a high-resistance element, described by P = I²R. Motors and generators convert electrical energy to mechanical energy and vice versa, while transformers transfer electrical energy between circuits without intentional heat generation.