hi guys im trying to figure out the relationship between power and V=IR because i have seen in some books statements like
"the power needed to produce the current...."
so how i understood this is like
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 that can be produced and that depend on the power that can be provided by the source.
3. different sources with the same voltage (ex. 1 volt) may have have different amounts of ability to provide power in them
4. which means even thought both have same voltage the maximum current it can generate will vary.
5. so when designing a circuit you 1st figure out the total current needed by the circuit and the total resistance and then figure out how much voltage is needed.
6.then you figure out the total power (w=VI) and find a voltage source of the desired voltage that can also produce this much of power.
7. and also you make sure the resisters that are used can with stand this power with out getting heated and melted.
thats what i can think of i do not know whether this is correct (at least at a higher level of abstraction) so can some with experience and knowledge tell me whether this is correct or incorrect and if it is incorrect why is that so ?
Thankz
"the power needed to produce the current...."
so how i understood this is like
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 that can be produced and that depend on the power that can be provided by the source.
3. different sources with the same voltage (ex. 1 volt) may have have different amounts of ability to provide power in them
4. which means even thought both have same voltage the maximum current it can generate will vary.
5. so when designing a circuit you 1st figure out the total current needed by the circuit and the total resistance and then figure out how much voltage is needed.
6.then you figure out the total power (w=VI) and find a voltage source of the desired voltage that can also produce this much of power.
7. and also you make sure the resisters that are used can with stand this power with out getting heated and melted.
thats what i can think of i do not know whether this is correct (at least at a higher level of abstraction) so can some with experience and knowledge tell me whether this is correct or incorrect and if it is incorrect why is that so ?
Thankz