As shown in figure a variable rheostat of `2kOmega` is used to control the potential difference a
Channel: Doubtnut
Date: 2020-01-26

As shown in figure a variable rheostat of `2kOmega` is used to control the potential difference across 500 ohm load. (i) If the resistance AB is `500 Omega`, what is the potential difference across the load ? (ii) If the load is removed, what should be the resistance at BC to get 40 volt btween B and C ?