Recent content by rahuld.exe

In the amplitude modulation equation, V=(Ec+Ei*coswt)coswt I don't understand why the instantaneous value of information signal is used. Shouldnt it be peak value as that would give the maximum value (amplitude)?

If an engine that requires 3kW to run exists... How many units of electricity will it consume in an hour... (1kWhr=1unit). I cannot get my head around this. I am new to this topic and with no one around to help me. This might be very basic to you all but i am just a kid. Sorry about that...

So many telecom operators claim that their users will get network coverage even inside an elevator. But according to Gauss' theorem, no charge is supposed to exist inside a closed conductor and an elevator (made of metal) is a closed conductor... So how is one supposed to get network coverage...

tell me if i am right through an inductor when AC current flows... because of ampere's law magnetic field is created... but since the current is always changing, the magnetic field is always changing... now due to faraday's law... the changing magnetic field causes a emf... but according the...

yeah i know about the inductor a little... it stores electrical energy in terms of magnetic field... yes i know what back emf is... it is the emf that opposes the applied emf due to self inductance? i had also mentioned about whether back emf is the cause of current lagging before...

in an inductor... with time current will increase and voltage will decrease? so the current-time graph of the capacitor will look like the voltage-time graph of the inductor?

hey... i am new to integration so am not that good at it... i got it with your method and hint.. thanks !

sorry i had made a mistake... i forgot the root sign... but i think this time i got it correct.. could you please check it for me... PS: moderators... i m not posting the solution... i am actually checking if what I've done is correct... http://img831.imageshack.us/i/p1010910lr.jpg/

yeah now 5 \int tan\theta tan\theta sec\theta d\theta put t = sec\theta therefore dt = sec\theta tan\theta d\theta draw a right angled triangle... using t = sec\theta.. you'll get value of two sides... find the value of the third side by pythagoras theorem... that way now you can find...

hey studiot... thanks a lot... the graphs helped hey berkeman... thanks a lot to you too... there is no confusion now about the capacitor, i have a clear idea now... thanks to you both! FOR INDUCTIVE CIRCUIT: I must always be a sine wave... therefore e will be cosine wave... thus i lags...

use x = root5 sectheta... i've solved it...works like a dream!...

yeah i get that they are proportional... what i don't understand is how does current proportional to change in voltage and voltage proportional to change in current suggest whether current lags or leads... kindly elaborate... i kinda understood what studiot said about capacitors... can a...

thanks!.. now just to summarize... tell me if I'm right.. In a capacitive circuit, for a small change in voltage, there is a large change in current... so current is always more in the circuit... thus current is always leading the voltage for a inductor, a small change in current results in...

@berkeman yeah that did help a lot i was familiar with the differential equation for inductance.. just didnt know that it is called that however could you temme how do you get that differential equation for capacitance? please!

thank u!