Thank you so much... Dhande sir... U r doing a lot for the students... U always think for the betterment of the students... By giving technical lectures and also through non technical lectures.. Really a great initiative... Hats off to GATE ACADEMY...
umesh dhande Sir ...can we solve this que by using v(0-) = v(0+) and using 1st order eqn. Of v(t)...then to find current differentiating v(t) nd multiplying with C...as i(t) = C* (dv(t)/dt).???...but by doing this we get option b. Plz reply
Thank u Sir 1) the level of the explanation .........Wonderfull 2) question selection are also good 3) The hard working that u r doing for us..........is remarkable
General capacitor charging equation is i = (1/R).(V - V0).e^(-t/RC). Initial voltage Vo= q/C = 50 volts, final voltage V = - 100 volts. Hence, because of opposite polarity, - i = (1/10).( -100- 50).e^(-2000t) = - 15.e^(-2000t) . finally, i = 15.e^(-2000t) Amperes.
thank you sir upload more video related to transient sir mai mady easy me study ki te but itna concept built nahi hua tha jitna ki aapke video se hua once again thank you sir
Thank u sir.....videos are really very helpful .....the method of concept explanation with help of questions is self sufficient to cover the topic.....sir please upload next network concept of ac analysis especially concepts related to power factor useful for ec students!!!
sir if v consider v[0-]=-50v then v[0]=v[0+]=-50v and after kvl v[infinite]=-100v. now graph starts from -50v and volt and at settling time 5T Vc[t] will be -100v "is this correct"
Thanks a lot sir. Gate EE 2014 a 1mark qns in which two switch position is given In RC network. Asking to find capacitor voltage. I have solved it I found it's correct answer by reversing V02 polarity. Which is not mention in given qns.please help me out whether I'm approaching in wrong direction????.
Sir kya hum voltage of capacitor ka function nikal ke. Fir c(dV(t)/dt) karke answer nahi nikal sakte??? Wese nikalne se answer 10exp(-2000t) aa raha hai. Please help.
sir pls tell me if we first calculate Capacitor voltage and than differentiate this voltage, we get current through capacitor but answer is different in this method pls explain sir
when you took Vc(0)=50 ..see the sign convention in diagram and then when you take Vc(infinity)= -100..check and solve once again..now you will get correct answer
when you took Vc(0)=50 ..see the sign convention in diagram and then when you take Vc(infinity)= -100..check and solve once again..now you will get correct answer
Sir ...can we solve this que by using v(0-) = v(0+) and using 1st order eqn. Of v(t)...then to find current differentiating v(t) nd multiplying with C...as i(t) = C* (dv(t)/dt).???
Vipul Singh i also have a same question but i solved and getting a wrong answer. If we solved using laplace then it will be correct by this method bcoz initial charge is playing a good role in it.
when you took Vc(0)=50 ..see the sign convention in diagram and then when you take Vc(infinity)= -100..check and solve once again..now you will get correct answer
Is question mein Vc (0-)= -50 aur Vc (infinite) = 0v hoga... Fir Vc (t) = -50exp(-2000t) hoga aur agar hum isse ic(t) nikalen to option B aa rha hai plz koi batao ki main kahan galti kar rha hun...
aman singh yes I know why r u getting different ans according to me u took V(0-)= 50v while you will have to take v(0-)= - 50v Bcz polarity is - to + w.r.t source.
Now that's called teaching...all points are touched perfectly in the question. Thanks Sir
Rohit Bansal Thank u .......we r trying our best
Thank you so much... Dhande sir... U r doing a lot for the students... U always think for the betterment of the students... By giving technical lectures and also through non technical lectures.. Really a great initiative... Hats off to GATE ACADEMY...
VIKRANT ANAND Thank u .......we r trying our best
umesh dhande
Sir ...can we solve this que by using v(0-) = v(0+) and using 1st order eqn. Of v(t)...then to find current differentiating v(t) nd multiplying with C...as i(t) = C* (dv(t)/dt).???...but by doing this we get option b.
Plz reply
Vipul Singh bro cmnt your wtsapp number i will send u solution
Every teacher should be like you sir.They must know what students need,Like you exactly know what our doubts are,what our confusions are. 👌👌
thank you sir aapki jitni tarrif ki jay utni kam h aapka liye to word hi nhi h.
Meenu Gangwar Thank u .......we r trying our best
Sir I think answer is option d, first find the capacitor voltage for any value of t then put obtained voltage equation in I=-cdv/dt
bro even i got the same answer
Thank u Sir
1) the level of the explanation .........Wonderfull
2) question selection are also good
3) The hard working that u r doing for us..........is remarkable
Akash ghosh Thank u .......we r trying our best
General capacitor charging equation is i = (1/R).(V - V0).e^(-t/RC).
Initial voltage Vo= q/C = 50 volts, final voltage V = - 100 volts. Hence, because of opposite polarity,
- i = (1/10).( -100- 50).e^(-2000t) = - 15.e^(-2000t) .
finally, i = 15.e^(-2000t) Amperes.
Good content
Dhande sir is doing what he loves..otherwise so many videos with so much energy shows sir passion for subject
Why I am not getting ans by different way I=cdv/dt
take initial voltage negative 50 due to capacitor polarity ,then check ans
Arun Kaparwan getting same ans in negative by cdv/dt
@@marketcycles2399 but why so..
Because of the difference between initial and final polarity difference across capacitor.
Thanks arun
Great Video....Even a beginner can master the concepts through your videos
U r the best teacher👍
thank you sir upload more video related to transient sir mai mady easy me study ki te but itna concept built nahi hua tha jitna ki aapke video se hua once again thank you sir
prakash kumar made easy me kaun class liya tha delhi me
prakash kumar Thank u .......we r trying our best
Thank u sir.....videos are really very helpful .....the method of concept explanation with help of questions is self sufficient to cover the topic.....sir please upload next network concept of ac analysis especially concepts related to power factor useful for ec students!!!
sir is question me agr capacitor ki polarity nhi diya hua hota to
apposite polarity lene pr answer same to nhi aata n ?
superb lecture delivery
We can also apply Laplace analysis (using energised capacitor Laplace equivalent) to solve it 🤗
sir if v consider v[0-]=-50v then v[0]=v[0+]=-50v and after kvl v[infinite]=-100v. now graph starts from -50v and volt and at settling time 5T Vc[t] will be -100v "is this correct"
Sir Aapko koi nhi rok sakta hai ..👏👏
What will be the Vc(infinite)
Sir is question me v(t) nikal ke derivation se nai kar sakte??
Best Best explanation sir.....
and vary vary thank u sir....
BABLOO KUMAR Thank u .......we r trying our best
I respect ur thought sir pls continue...
Vishal Prasad Thank u .......we r trying our best
Sir plzz upload on general aptitude question
Thanks a lot sir.
Gate EE 2014 a 1mark qns in which two switch position is given In RC network. Asking to find capacitor voltage. I have solved it I found it's correct answer by reversing V02 polarity. Which is not mention in given qns.please help me out whether I'm approaching in wrong direction????.
Sir kya hum voltage of capacitor ka function nikal ke. Fir c(dV(t)/dt) karke answer nahi nikal sakte???
Wese nikalne se answer 10exp(-2000t) aa raha hai. Please help.
Take negative of 50 v for voltage across capacitor at t(0+) and differentiate it.
Excellent sir
sir pls tell me
if we first calculate Capacitor voltage and than differentiate this voltage, we get current through capacitor but answer is different in this method
pls explain sir
when you took Vc(0)=50 ..see the sign convention in diagram and then when you take Vc(infinity)= -100..check and solve once again..now you will get correct answer
Take Vc(0-)=-50
Sir pls upload mechanical videos also
aap bahut acha btate hain..
arun kumar Thank u .......we r trying our best
Sir if we are calculating the voltage and then making C*dv/dt
Because when we are doing this we are not getting the same answer
Im getting ans as d
Edit: I got ans as a, i was taking polarity wrong u see in q they have mentioned polarity for Vc(0+) its opposite to Vc(infinite)
SIR BY SOLVING FOR Vc(t) AND THEN DIFF IT FOR I(t).....................ANS IS NOT COMING SIR WHY..??
when you took Vc(0)=50 ..see the sign convention in diagram and then when you take Vc(infinity)= -100..check and solve once again..now you will get correct answer
Ans i(t)= -10+15exp(-2×10^3)t , is this write or wrong , mera v(t)=-100+150(-2×10^3)t aya hai
Sir ...can we solve this que by using v(0-) = v(0+) and using 1st order eqn. Of v(t)...then to find current differentiating v(t) nd multiplying with C...as i(t) = C* (dv(t)/dt).???
Vipul Singh i also have a same question but i solved and getting a wrong answer. If we solved using laplace then it will be correct by this method bcoz initial charge is playing a good role in it.
when you took Vc(0)=50 ..see the sign convention in diagram and then when you take Vc(infinity)= -100..check and solve once again..now you will get correct answer
@@iitian2884
Mathematically Answer is same but negative
Is question mein Vc (0-)= -50 aur Vc (infinite) = 0v hoga...
Fir Vc (t) = -50exp(-2000t) hoga aur agar hum isse ic(t) nikalen to option B aa rha hai plz koi batao ki main kahan galti kar rha hun...
Took V@0 as -50v and V@ infinity as 100v.. then will get the same answer as sir's by dv/dt method
For getting i(0) , can i take i(0)=i(0-)=i(0+) ?
Vrushabh bhai resister ye property nhi show karta..
Sir RC transient analysis qn ka answer tho 5e^-2000t aa raha h
Am I correct?
Capacitor ho tho first find v(t)
Then I(t)=Cdv(t)/dt
superb gurudev
Kulvant Singh Thank u .......we r trying our best
power system par kuch video bna dijiye please
Polarity of c in Voltage source kaise pata karte hai
Sir (100-50)/10 hoga current kvl for resistor at t 0
sir please continue the opamp topic it is pending since long time.
Sir pls upload some video On EMT
sir please upload analog videos
umesh dhande i am solving this as-
V(t) = 100 + (50-100) e^(-2000t)
i(t)= C*dV(t)/dt = 5e^(-2000t)
Ans is not same....
Please correct me!
Ajay kumar meena 👍🏻
Thank you sir...
in this question sir can we first calculate v(t) and then by relation i(t)=c(dv/dt) find i(t)??
aman singh yes
umesh dhande but sir ans nhi aa rha hai!
V(t) = 100 + (50-100) e^(-2000t)
i(t)= C*dV(t)/dt = 5e^(-2000t)
Please correct me!
yes sir by this method iam also getting different answer
aman singh yes I know why r u getting different ans according to me u took V(0-)= 50v while you will have to take v(0-)= - 50v Bcz polarity is - to + w.r.t source.
@@MdFaisal-gz3ug yes ,, now I'm getting the same answer by dv/dt method
I think initial voltage should be 5 volt....
Sir I am using v(t) = v(inf) + (v(0+) - v(inf))exp(-t/tau) and than use I(t) = Cd(v(t))/dt but I am getting different answer plz correct me
V(inf)=100V
V(initial)= -50V
Then solve
V(t)=100+(-50-100)exp -2*10^3t
Thanks a lot!
Sir civil engineering ke video nhi aare h bilkul bhi
Thank you so much sir
Vc(0-)=Vc(0+)=50V
Vc(inf)=-100V
Then Ic(t)=(50/1000000)*150*(-2000)*
exp(-2000t)
=-15exp(-2000t)
Im getting ans in -ve kindly correct me
Yes I am also get negative answer
Thank you sir
pardeep bajwa Thank u .......we r trying our best
umesh dhande sir you are always best
civil ka bhi kuch to video bnao
👍9th Feb 2018
civil ka bhi kuch to video bnao