The Resistance Box is a precision electrical instrument widely used in physics and electronics laboratories for accurate resistance measurement and circuit experiments. It is constructed inside a durable wooden box with a series of brass terminals and removable plugs on the top panel. Each plug corresponds to a specific resistance value, and by removing or inserting the plugs, users can easily adjust the total resistance in the circuit. The resistance coils inside are made of manganin, an alloy known for its low temperature coefficient, ensuring stable and reliable readings over time. This makes the instrument highly suitable for sensitive experiments such as Wheatstone bridge and meter bridge applications. The non-inductive design further improves accuracy by minimizing interference. This resistance box is commonly used in schools, colleges, and research laboratories for teaching, calibration, and testing purposes. It offers high precision, durability, and ease of operation, making it an essential tool in any physics lab setup.