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)
Shanu arora
the negative sigh in 25v is coming by applying kvl in opposite form .that's it , nothing more than that. and about I_d = is coming from given 1V and 500ohm , feel free for any doubts best regards.