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Answered 2010-11-29 14:41:52

A 60 watt incandescent bulb using 120 Volts draws about one-half amp.

Watts = Volts x Amps (For a resistive load).

By Ohm's Law Volts = Current x Resistance so R = 120 V / .5 A = 240 Ohms.

Doing the same math for a 40 watt bulb you get 360 Ohms.

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What is the resistance of a 40 watt bulb?

On this calculation I am assuming that the light bulb is using a 120 volt source. Watts = Amps x Volts. Amps = Watts/Volts, 40/120 = .33 amps. R = Volts/Amps, 120/.33 = 363.6 ohms resistance in the 40 watt light bulb.

Is a 10 watt bulb the same as a normAl 40 watt bulb?

Electrically, a 10-watt bulb uses 75% less energy than a 40-watt bulb. For the same circuit voltage, let's say 120v, a 10-watt bulb would only draw 0.083 amperes, compared to 0.33 A for a 40-watt bulb. Light-output-wise, they may not have the same ratio of light output. If a 40-watt lightbulb provides 400 lumens of light, a 10-watt lightbulb that is more energy-efficient than the 40-watt bulb may produce more than 100 lumens which is greater than 1/4 of the light output of the 40-watt bulb. A 10-watt bulb that is less energy-efficient than the same 40-watt bulb would produce less than 100 lumens of light.

Will 40 watt bulb work for 34 watt bulb?

It will work, a 40 w bulb is a little brighter than a 34 w and it takes a little more electric power.

Which bulb uses more electricity40 watts100 watts or 120 watt?

The higher the wattage the more you pay for power. So it costs more to operate a 120 watt bulb than it does a 100 or 40 watt bulb.

Why the power drawn across 40 watt bulb more than 60 watt bulb?

It isn't more, it is less if bulbs are of the same type.

Conected in series which bulb will glow brighter A 40 watt bulb or a 100 watt bulb?

the 40 watt bulb will glow brighter in series because it will consume less power.

A 60-watt 120 volt lamp requires morecurrrent than a 40 watt 120 volt lamp?

Yes. A 60W bulb has a higher resistance than the 40W buld. The extra resistance requires more current to light up the bulb. The fillament then glows brighter.

Why is a 100 watt light bulb brighter than a 40 watt light bulb?

Because more energy goes through it, you pay more and you get more result.AnswerA 100-W lamp has a lower operating resistance than a 40-W lamp. Since power is equal to the voltage squared divided by the resistance, for a given voltage the power will be higher and its operating temperature (therefore brightness) will be higher.

What is the difference between a 40 watt bulb and a 100 watt bulb?

60 watts. This means that the 40 watt bulb uses less electricity but it also produces less light.

How many lumens will a 40 watt bulb produce?

It depends on the bulb and its efficiency. A typical 40 watt incandescent bulb puts out about 475 lumens.

What does 40 watts bulb mean?

An electrical watt is a measure of power. A 40 watt light bulb uses 40 watts of electrical power. It has a relative measure of twice the light output of a 20 watt bulb and one half the output of an 80 watt bulb. A 40 watt bulb uses 40 Joules of energy each second, or 40 watt-hours of energy each hour. In 1000 hours it uses 40 kilowatt-hours or Units of electrical energy.

How many watts are in a security light with a 40 watt bulb?

If it is a 40 Watt bulb it converts energy at the rate of 40 Watts as long as it is switched on.

How many volts does a 40 watt light bulb use?

A watt is 1 volt x 1 amp. Your question doesn't contain enough information. You would need to know the resistance of the bulb, which is related to the design.

Which will last longer a 40 watt bulb or a 60 watt bulb?

They will last about the same period of time.

How do you use the word dimmer in a sentence?

A 40 watt bulb is dimmer than a 100 watt bulb.

Can you use a 60 watt bulb in a lamp that says 40 watt?

Technically speaking a bulb and a lamp are the same thing. You can use a 60 watt bulb in a fixture calling for a 40 watt bulb but I wouldn't. The lighting fixture may get to hot, melt and start a fire.

Why does a 40 watt bulb evaporate more water faster than a 60 watt bulb?

Possibly but its really never been proven. In my opinion I think it won't.

What is the minimum watt of a light bulb for night reading?

40 watt light bulb. This is obvious. Go do an experiment. -_-

Can you put a 40 watt bulb in a 60 watt lamp?

no because it will be to little

What is a g type light bulb?

looking for a 40 watt g bulb what is that?

How much watts does a lamp use?

It depends on the bulb. A 25 watt bulb uses 25 watts, a 40 watt uses 40 watts, a 60 watt bulb uses 60 watts, a 75 watt bulb uses 75 watts, a 100 watt bulb uses 100 watts, all the way up to a 500 watt bulb. Incandescent bulbs are about to cease to exist, so this answer is only good through the fall.

Can you replace a 40 watt 130 volt oven bulb with a 40 watt 120 volt oven bulb?

Yes you can as long as it doesnt have a a higher wattage or voltage

If two bulbs of 40 watts and 60 watts are connected in series why will the 40 watt bulb glow more than the 60 watt bulb?

Because the filament of a 40-W lamp has a higher resistance than that of a 60-W lamp and, therefore, will experience a greater voltage drop -the lamp with the voltage drop closer to its rated voltage (in this case, the 40-W lamp) will be the brighter.Read more: Why_does_a_25_watt_bulb_glow_brighter_than_60_watt_in_a_series_circuit

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