current elect pyq
if i solve using kvl i get 2.7 (2.667 precise) but correct answer is 3.3 which can be achieved by kcl or combination of cells (ive watched various solution videos) but i cant understand why it just doesnt work with kvl, did i do calc mistake or theres some conceptual error? can someone do a kvl solution and post?
17 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.can you please share your kvl way of doing it? agar kahi likha hua toh?
and kvl aur kcl me fark kya hai?
is kcl current in = current out and kvl = potential drop across resisters?
yes sir
just a sec lemme send my approach
pretty hard to take a clear pic cuz i solve vertically in 3 columns
basically what i did:
i took two loops left and right, i1 is current in left, i2 is current in right and i1 + i2 is the current through resistory R2 (which is in middle). i solve the the equations using kvl and got i1 = 1/3 A and i2 = 1/3 A then i used V = E - iR1 in middle to find potential and i got 2.66V
but the answer is 3.3V
You can absolutely solve this with kcl and kvl you are probably having issue with equation making
However circuits with more than one battery i suggest to use superposition of emf method
Physics Galaxy
YouTube
1 Questions 9 Short Cut Tricks for Current Electricity Problems
Every Circuit question of Current Electricity can be solved by 9 short cut tricks. Current Electricity is an important and high weight topic for JEE Main 202...
7th method
okay
i probably did some mistakes in calculation or equation making
hmm
i see
so the formula V = E - iR gives only the voltage diff across the resistor and not the whole wire AB
okay okay
i get it
but this approach is pretty confusing ngl
ill stick to kcl and superposition
Which?
thanks for the help!
the kvl approach since i have to take in account the negative sign
Yup thats why i sent u that video been there
yeah
i'd watched that a few months ago
now i remember
anyways thank u
+solved @SIMPle Potato
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