What should be the range of resistance values Ro extracted from Resistance box and why?

The range of resistance values (Ro) extracted from a resistance box should be determined based on the specific requirements of the experiment or circuit in which it is being used. Here are the steps to determine the range:

1. Identify the Requirements: Understand the electrical requirements of your circuit or experiment. This includes the desired current, voltage, and power levels.

2. Calculate Maximum and Minimum Resistance: Use Ohm's Law (V=IR) and the Power Law (P=IV) to calculate the maximum and minimum resistance values that will allow your circuit to function properly without causing damage.

3. Consider Safety Margins: It's always a good idea to include a safety margin in your calculations to account for potential variations in other components or conditions. This might mean choosing resistance values slightly higher or lower than your calculated maximum and minimum.

4. Check Resistance Box Specifications: Finally, check the specifications of your resistance box to ensure it can provide the resistance values you've determined.

Remember, the resistance box should be able to provide a range of resistance values to allow for flexibility and adjustments in your experiment or circuit. The exact range will depend on your specific requirements.