How Much voltage does a 100watt lightbulb have? 40Watt?

Question

a 60Watt lightbulb has voltage of 120V

Answer 1

Three terms you need to know are:

Voltage- This is the "potential" to make current flow through
a wire. (measured in volts)
Current- This is the actual electrons or "electricity" which
"flows" through the wire. (measured in amperes or amps)
Resistance- This is the quality of a substance which tends to
allow or inhibit the flow of electricity.

One more term is power. This is measured in Watts and is
given as 1 Watt=(1 volt)(1 amp)

Here's how it works. You put a voltage across a wire.
You decide the voltage. It does not change. The wire and bulb has "resistance" and only lets a certain amount or current flow. The current flows through the bulb and lights the bulb.
So both 100 watt bulbs and 40 watt bulbs have the same
120v "voltage". The difference is that less current flows through the 40 watt bulb, so it is dimmer.
Remember that power or "Watts" is current times voltage.
so lower wattage means lower current.
The question should be how much current does each bulb use.
The answer is: 100 watt-5/6 amp
60 watt- 1/2 amp
40 watt- 1/3 amp

Answer 2

The voltage is standard for all electric appliances plugged in to the wall. In the US that is 110V or 120V. In the UK the standard is 220V.

If the appliance does not use that high voltage, there is a power convertor somewhere along the electrical cord. On a laptop you will see a power adapter midway along the electrical cord.

Take care,
Troy

Answer 3

Electronics Lab - Community
... off and makes a voltage spike does it get destroyed or does it just conduct for ... The lightbulb is a PTC resistor so its resistance is much less when cooler. ...electronics-lab.com/forum/index.php?board=12;action=display;threadi...
Home Theater Spot: hts-5100 back breaker...
... hypothethically for math purposes, a 100watt lightbulb plugged into a 100volt ac ... Monster boxes have lovely LED readings for things like Voltage. ...www.hometheaterspot.com/htsthreads/showflat.php?Number=760618
Page 2 - Light bulb!
... means to calibrate how much power you're making when the lightbulb is at 100w. ... light a 100watt bulb with the right intensity..amps...voltage...blah ...www.cyclingforums.com/showthread.php?p=2657003#post2657003

Answer 4

Whoa, your question reveals that you do not change the light bulbs in your home regularly ! All of the bulbs you mentioned can be used with 120 volt lines, and if you lived in parts of Asia and Europe, on 220 Volts.
Wattage is the amount of electricity used, and you havent asked about the lumens yet! The higher the number, eg.100 w- will provide the brightest light. The lowest 40w will be the dimmest.
Dont forget the filaments used. regular incandescent or fluorescent bulbs.
The latest development in bulbs are LEDs. Light Emitting Diodes. They burn brighter than regular bulbs and used hardly any electricity.
+++++++++++
Here is a good website
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Watts to Know

The Federal Trade Commission's Appliance Labeling Rule requires light bulb manufacturers to provide information on packages to help consumers choose the most energy-efficient bulbs for their needs. The Rule applies to all household light bulbs except small, screw-base bulbs like night lights and chandelier bulbs.

The packages for standard bulbs -- including halogen, reflector bulbs and compact fluorescent bulbs -- must give information about:

*

light output -- how much light the bulb produces, measured in lumens. A 60-watt regular incandescent bulb yields about 855 lumens. A 15-watt compact fluorescent bulb yields about 900 lumens.
*

energy usage -- the total electrical power a bulb uses, measured in watts.
*

design voltage -- if the bulb is not 120 volts. Most bulbs run on 120 volts. Light output and efficiency decrease when you use a bulb with a 125 or 130 design voltage in a region that provides electrical service at 120 volts.
*

average life in hours -- how long you can expect the bulb to last.
*

number of light bulbs in the package.

Replacement Value

Energy-efficient bulbs may cost you more initially, but they can save you money in the long run in out-of-pocket expenses. Here's an example:

Suppose your living room table lamp is turned on for 1,000 hours a year, and your local electric utility charges eight cents per kilowatt hour. A 15-watt compact fluorescent bulb may cost you $20, considerably more than the dollar or so that you'd spend for a standard 60-watt bulb that provides the same amount of light. But the compact fluorescent bulb should last for 10 years, while the standard bulb likely will be replaced every year. The compact fluorescent bulb costs about $1.20 a year to operate; the standard bulb costs $4.80. For a one-time initial extra payment of $19.00, you can receive $4.60 in savings each year ($3.60 electricity cost and $1.00 bulb cost) for 10 years.

The benefits of compact fluorescent bulbs are clear: lower operating costs, longer operating life and more efficient use of energy.

Answer 5

100 watt 120 volt again 60 watt 120 volt

Answer 6

the 120V you cite is the voltage rating of the bulb, meaning it is intended to be operated with 120V applied across its terminals. the bulb itself doesn't "have a voltage".

Answer 7

100w or 60w or 40w are also can use with 110v or 24v or 12 v...or even 6 volt....depending on manufacotry built them....
watt is 1 thing but volt is another thing...they are not likely run all in 1 type of voltage...
good luck.

Answer 8

High Performance Tactical Flashlight : http://FlashLight.uzaev.com/?krnm

Answer 9

120 volts for both

Answer 10

Why?