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ahhh i see what you trying to say i guess is in many resisters the max allowed voltage is less than the voltage when the resistor is at its max power dissipation rate
ok i do undestand but why would you need to mention the max allowed high voltage.you would never be able to connect the resister to such a high voltage (or to a one close to that) and use it because as soon as you provide a voltage (which is much smaller ) that will make the resistor exceed...
hmmmmm
i still cant undestand this fully
simply put in a resister you have a power dissipation rating right.
using W=V^2/R you can find the V right
if you connect the resistance to a higher voltage than this given V the resister will over heat right
so we should not connect the resister to...
so i guess at a higher level what i said is accurate but if you dig deeper there are lots of other things to consider.
and since im starting out in electronics i hope the higher level description will be enough to build and analise and to understand simple circuits. :)
Added after 11...
yea i agree with you
and when you say "It will not be able to sustain it's duty to regulate the voltage at 5V. It will drop. The voltage drop will cause the rest of the circuit to malfunction"
does it mean that if you have a voltage source with a given voltage of 1V this means that if you...
yes and i have also seen in books
"the power needed to produce the current"
so what i can think of is
1. in a ideal perfect situation V=IR holds true and a certain V can produce any amount of current depending on the resistance.
2. but in practical situation there is a limit to the current...
ahhhh i think i get it now resister arching is not the same as resister over heating. but that just make me have more questions in my head lol.
if you cant connect a given resister to a voltage that is more that 4.7 V (if you do it will burn) why would the resistor manufactor even mention about...
thankz audio gury
i have a small question
1) A 220 ohm 1/4W resistor dissipates 1/4W when its voltage is only 7.4V.
what happens if 7.4V is exceeded?
as you have stated max allowed voltage for a 1/4W carbon-film resistor is 200V or 250V. so if you use a voltage as much as 200V the power...
so there is no connection between voltage rating and the power dissipation rating i thought that you can find I using w=(I^2)*R
and from I we can find V using V=IR or W=VI. i thought this V is the max allowed voltage rating. isnt this so ?
thankz FvM
so where does w=VI fit into whole scheme of things i have seen in books
" if the source cannot supply 10w. its out put voltage drops with the excessive current load.Then the current is reduced"
what exactly does this mean how does this relate to V=IR (i know how the equations...
yea true using P=v^2/R we can get p. but in a certain electronic book it was stated that
"
the maximum working rating off a resistor is the maximum allowable voltage that the resistor can safely
withstand with out internal acing . the higher the wattage rating of the resistor the...
"The answear to your question is depend of the energy source. You if you have a small battery only a small amount of current will be permited. "
how does this relate to V=IR , if V=1 and R=0.001 ohms then current should be 1000 A right.so then why doent this holds true
ok thankz
can you guys tell me normally when when a power rating is given by a resister you can find the voltage when that amount of power is dissipated.so the resister should be able to handle this amount of voltage right.but why does many have a working voltage less than that ?
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