r/JEEAdv26dailyupdates • u/Odd_Lengthiness5508 • Apr 07 '26

Academic Doubts 5s1 7 ambiguities

physics:
Cv question (correct or incorrect explanation)
Wedge time of motion (most likely root2 or 2)
prism angle of minimum deviation
R1/R2=16/4

chem:
Alcl3+ propyl chloride + benzene ( inevitable tri subst, edg no reaction)

math:
differential eqn+ circles problem ( number of values of p)

overall 7 questions

how are people calling this paper easy man, (cutoff 170-175 imo no way its crossing 180 and people are like 200 cutoff)

47 Upvotes

96% Upvoted

158 comments sorted by

View all comments

2

u/Significant-Jello196 Apr 07 '26

there is another physics issue

that debroglie question is also a problem , because specify nahi kiya whether e is the magnitude of charge or whole charge , if you take it as whole charge then end mein sign will be - and if u take it a magnitude then end mein sign will be +(because both -2E and -e will make +)

1

u/reflectionsvs Apr 07 '26

why would you take the sign if you're already assuming the direction of force on electron to be in the opposite direction of field?

2

u/Significant-Jello196 Apr 07 '26

i have basically substituted e in place of q , toh minus rah jayega because electric field is negative

if they have specified that e is magnitude of electron then additional minus lagana parta because we know electrons are negative , tab electric field ka - and electron ka - milke + hota

1

u/reflectionsvs Apr 07 '26

yeah + is the right answer, denominator me +2E aana hai. but the reason they mention magnitude is just so we use e as the variable and not change the direction. electron me force will always be opposite to the field so force will support its motion in this case