Help me understand electricity please

[Lord Byron]

If volts (potential force of electron flow) = ohms (resistance as in a lightbulb) times amperage ( the number of electrons actually flowing through the wire)

then


100 volts = 5 omhs times 20 amps

ok, got it so far

BUT LOOK AT WHAT HAPPENS NEXT AS I MAKE THE LIGHTBULB BIGGER


100 volts = 20 ohms times 5 amps

this means the higher the resistance (ie the bigger the lightbulb) the smaller wire you need to carry the current as the amps are lesser with the higher resistance

This makes no sense

 

[papasmerf]

If volts (potential force of electron flow) = ohms (resistance as in a lightbulb) times amperage ( the number of electrons actually flowing through the wire)

then


100 volts = 5 omhs times 20 amps

ok, got it so far

BUT LOOK AT WHAT HAPPENS NEXT AS I MAKE THE LIGHTBULB BIGGER


100 volts = 20 ohms times 5 amps

this means the higher the resistance (ie the bigger the lightbulb) the smaller wire you need to carry the current as the amps are lesser with the higher resistance

This makes no sense

you are right your post makes no sense.

Lights are rated in WATTS and that is represented by P=IE, P is power, I is Amp and E is the applied Voltage. You seem to be confused OHMS LAW and your misapplying it. I=E/R http://en.wikipedia.org/wiki/Ohm's_law

 

[Radio_Shack]

http://www.expertvillage.com/video/165406_does-light-bulb-work.htm

 

[danmand]

If volts (potential force of electron flow) = ohms (resistance as in a lightbulb) times amperage ( the number of electrons actually flowing through the wire)

then


100 volts = 5 omhs times 20 amps

ok, got it so far

BUT LOOK AT WHAT HAPPENS NEXT AS I MAKE THE LIGHTBULB BIGGER


100 volts = 20 ohms times 5 amps

this means the higher the resistance (ie the bigger the lightbulb) the smaller wire you need to carry the current as the amps are lesser with the higher resistance

This makes no sense

Here is where you are wrong:

i=e/r i is amperage, e is volage, r is resistance

energy (in watts) = i * e = e *e /r

A larger light bulb means more watts, and because the voltage is constant 110, more watts means lower resistence.

 

[papasmerf]

Here is where you are wrong:

i=e/r i is amperage, e is volage, r is resistance

energy (in watts) = i * e = e *e /r

A larger light bulb means more watts, and because the voltage is constant 110, more watts means lower resistence.

Or just refer to post number 2

 

[Lord Byron]

Here is where you are wrong:

i=e/r i is amperage, e is volage, r is resistance

energy (in watts) = i * e = e *e /r

A larger light bulb means more watts, and because the voltage is constant 110, more watts means lower resistence.

i am struggling here. need to keep it simple . i am a poet not an engineer

no lightbulb means no resistance therefore need bigger wire as no resistance means more electrons flow

ok

now cut the wire and put a lightbulb ( actually you could just create a gap in the wire and increase or decrease the gap as this would effect same result I suspect) on the circuit

the smaller the lightbulb would equal the greater the circuit gap if we used the gap as the example
this means the greater ( not lesser ) resistance because the smaller bulb uses less watts and because the resistance is greater this means less electron flow which means smaller wire?

correct?

thx for correspondence

 

[papasmerf]

i am struggling here. need to keep it simple . i am a poet not an engineer

no lightbulb means no resistance therefore need bigger wire as no resistance means more electrons flow

ok

now cut the wire and put a lightbulb ( actually you could just create a gap in the wire and increase or decrease the gap as this would effect same result I suspect) on the circuit

the smaller the lightbulb would equal the greater the circuit gap if we used the gap as the example
this means the greater ( not lesser ) resistance because the smaller bulb uses less watts and because the resistance is greater this means less electron flow which means smaller wire?

correct?

thx for correspondence

Zero RESISTANCE is represented as ZERO and zero time any number equals what?

 

[ang]

Foot candles??

 

[bishop]

Larger light bulb = lower resistance = more current for the same voltage
Smaller light bulb = high resistance = less current for the same voltage
no light bulb = infinite resistance, Current = V/infinity = 0

A resistance of 0 means you shorted the power to ground, Current = V/0 = infinity

You equation of V=I*R is correct
The problem is that you think that larger light bulb = higher resistance, it is the opposite.

 

[T.O.tourist]

Ohm's Power Law, expresses the strength of an electrical current:

Volts x Amperes (Amps) = Watts

 

[Radio_Shack]

Joke:

How many Terb members does it take to explain a light bulb.

 

[toughb]

This is the most shocking post I've ever come across...

 

[LKD]

btw these formulas will help you in some of your electricity calculations.....

Temperature = t or T (in Kelvins or degree celcius)

Conductivity = k (amount of energy flow per unit area, per unit time, per unit temperature)

Conductance = thickness l / conductivity k

Resistance = 1 / Conductance (RSI in metric, R in imperial)

Overall heat transfer co-efficent = 1/RSI Total

Heat Flow = Overall heat transfer co-efficent * Inside Temperature - Outside Temperature * Surface Area

 

[phail]

well i've dont have any bright ideas

 

[shakenbake]

Here is where you are wrong:

i=e/r i is amperage, e is volage, r is resistance

energy (in watts) = i * e = e *e /r

A larger light bulb means more watts, and because the voltage is constant 110, more watts means lower resistence.

Uhm, danmand;

I think that you mean Power, not Energy in watts.

 

[Cycleguy007]

I`m hoping someone sheds some light on this situation very soon!

OH, and Radio_shack? The answer to your question:

How many Terb members does it take to explain a light bulb.

is 180...

https://terb.cc/vbulletin/showthread.php?t=102864&highlight=light+bulb

 

[alan9080]

Are you guys getting a real "charge" out of this?

 

[T.O.tourist]

It has been enlightening

 

[Cassini]

now cut the wire and put a lightbulb ( actually you could just create a gap in the wire and increase or decrease the gap as this would effect same result I suspect) on the circuit

Yes, cutting a gap into a wire and varying the spacing is a technique used to generate light. In fact, old carbon-arc lights used to work this way, and they were used a long long time ago. The technique was also used for radio transmission.

Unfortunately, experimenting with this technique is a good way to:
a) Go blind!
b) Create flashes and loud sparking noises and blow lots of fuses!
c) Knock out radio reception.
d) Get the local power company really annoyed at you.
e) Blow out a breaker panel.
f) Suffer from electrical burns.
g) Plate your lungs with metal oxide.
h) All of the above.

Correct Answer is H. DON'T DO THIS. If the fuses don't blow, this is a good way of getting yourself badly hurt. For those people with circuit breakers, circuit breakers have been known to fuse closed under this kind of abuse.

Not to be nasty, but I saw the aftermath after someone tried doing this once, although not deliberately.

 

[LKD]

Yes, cutting a gap into a wire and varying the spacing is a technique used to generate light. In fact, old carbon-arc lights used to work this way, and they were used a long long time ago. The technique was also used for radio transmission.

Unfortunately, experimenting with this technique is a good way to:
a) Go blind!
b) Create flashes and loud sparking noises and blow lots of fuses!
c) Knock out radio reception.
d) Get the local power company really annoyed at you.
e) Blow out a breaker panel.
f) Suffer from electrical burns.
g) Plate your lungs with metal oxide.
h) All of the above.

Correct Answer is H. DON'T DO THIS. If the fuses don't blow, this is a good way of getting yourself badly hurt. For those people with circuit breakers, circuit breakers have been known to fuse closed under this kind of abuse.

Not to be nasty, but I saw the aftermath after someone tried doing this once, although not deliberately.

getting yourself badly hurt? Let say it could cost you your life. Don't play with electricity if you don't have much clue about it. I know at least 3 'certified' electricians who got electrocuted and cost them their lives. The last time I messed around with electricity was around 10 yrs, and even today I cringe thinking about it... I'm thankful nothing happened