ANS:C - 3-4

The correct range of silicon percentage in the silicon steel used for electrical appliances/equipment is 3-4. Silicon steel, also known as electrical steel or transformer steel, typically contains around 3-4% silicon by weight. This silicon content is added to improve the electrical and magnetic properties of the steel, making it suitable for use in electrical appliances and equipment, particularly transformers and electric motors. The presence of silicon helps to reduce energy losses due to eddy currents and hysteresis in the material, thereby increasing the efficiency of electrical devices.