Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Dr suman 1
use thenvein theoram. first 4 ohm resistance is the load resistance now remove the RL and make open circuit then . then voltage source can be replaced by internal resistance and the internal resistance of voltage is zero so that make the short circuit. now identify the resistance in series and parallel and calculate the equivalent resistance.