37 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.let the resistance of circled part be R
effective circut is this
clearly voltmeter is in parallel to R and the system above
upon increasing resistance of rheostat voltage drop across the system remains same
and ammeter reading decreased
where am i going wrong
is the answer a?
nope
it's c?
i dont think you can write it this way though
@hardcoreisdead if c is the ans, then here's the soln
i think taking a single resistor R and putting a voltmeter across it is wrong
cuz the first two portions are in parallel
you cant directly take it in series with the other resistor
Haan yaar baat toh shi hai
You can't do this
Voltage on the upper horizontal line drops after every resistor
By taking It while as R
You are not taking theta drop into consideration
how can we be sure i1>i2
like we can do it by applying kvl and seeing the drop on the first resistor
but yeah i1>i2 because the total current as well the ratio decreases
cuz i through ammeter will be total current times the other resistance/ total
This is suffice ig
@nori
hey could u clear up one thing
why would total resistance reduce
the rheostat wala resistance increased right.. toh parallel wale ka value will also increase totality me @hardcoreisdead
rheostat resistance inc
its in parallel
so kam hogi right?
1/2 1/3 = 5/6 ==> resistance = 6/5
1/2 1/2 = 1 ==> resistance = 1
yeah toh badh raha hai na, when denominator increases
or am i just idk
that's also what i did here
let initially be 1/3 and 1/2 so uski resistance 6/5 hui
let it increase to 1/2 and 1/2 so uski 1 hui
is this wrong
either u r tripping or i am tripping
yeah idk
some 3rd person needed
@integralofe^2v help brother
is this correct
1/R1 + 1/Rv (rv is the rheostat wala variable).. so when Rv increases , 1/Rv decreases. so 1/Req decreases
so Req increases
ohhhhhhh
ohhhh
u r addin them up
pura proof kharab ho gya
infact nhi hua
rheostat ki resistance badha ke overall resistance badh gyi
so kam current jayega pure system mein
so fs ammeter mein kam jayega
baaki stuff still holds
@nori right?
yeahh
it's a lot easier this way
what way
nhi when it increases
yeah like compared to the case u did before
if like it were to decrease
yeahh
sorted right??
close kardu?
yeah
+solved @nori
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