2007-12-21 16:15:48 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
See the inscription on it 60W/110V 0r 60W/220-240V.
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If there is no inscription, I would like to test it using 110V ( you might need a stepdown transformer ). See if the bulb brightness is normal for a 60W bulb - if the brightness is just like a 15W bulb then it is 220V.
2007-12-23 11:42:54 · answer #1 · answered by amrobyono 3 · 0⤊ 0⤋
It isn't anything in volts. The watt is a unit of power, in this case power consumption. Assuming this is a normal household 60 watt bulb, the unwritten assumption is that you are going to plug this into the 120 volt electrical system of the house. The 60 watt bulb has a certain resistance to the flow of electricity, in this case about 240 ohms (when hot). When the 120 volts sees an electrical path (circuit) with 240 ohms of resistance, an electrical current of 1/2 ampere is produced. Current (I) = Voltage / Resistance which is called Ohm's law. A 1/2 ampere current at 120 volts has 60 watts of power. Power = Voltage x Current If you use a 100 watt bulb, the house voltage stays the same but resistance of the bulb is less so more current flows. The larger current at the same voltage is consuming more watts of power.
2007-12-21 16:45:09 · answer #2 · answered by Engineer Dave 3 · 0⤊ 0⤋
Incandescent lamps are nearly pure resistive loads which means they have a power factor of 1. This means the actual power consumed (in watts) and the apparent power (in volt-amperes) are equal. The actual resistance of the filament is temperature dependent. The cold resistance is about 1/15 the resistance when the lamp is lit. For example, a 100 watt, 120 volt lamp has a resistance of 144 Ω when lit, but the cold resistance is much lower (about 9.5 ohms) . Since incandescent lamps are resistive loads, simple triac dimmers can be used to control brightness. Electrical contacts may carry a "T" rating symbol indicating that they are designed to control circuits with the high inrush current characteristic of tungsten lamps. For a 100-watt 120 volt general service lamp, the current stabilizes in about 0.10 seconds, and the lamp reaches 90% of its full brightness after about 0.13 seconds.
Therefore, 60 watts = 120volts in general
2007-12-21 20:43:03 · answer #3 · answered by Anonymous · 1⤊ 0⤋
watts is the measure ment of power being used the voltage is what will be applied to light the bulb it should say on the bulb what voltage it is rated for in northamerica it is usually 120 volts for house power . You can buy 24 volt bulbsd and 12 volt bulb for trailers and boats these should not be put in your house circuits. Light bulbs can be bought for higher voltages like 240 V and 600V through electrical wholesalers
2007-12-21 16:30:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Volts = Watts/Amps
Also if you have a 60 watt bulb you can also look on top of the bulb it has it there often.
2007-12-21 16:26:23 · answer #5 · answered by JR 2 · 0⤊ 0⤋
115 -120 Volts RMS. Every house has 120 Volts.
P=VI
P - Power
V - Voltage
I - Current
2007-12-21 16:31:32 · answer #6 · answered by Jason D 2 · 0⤊ 1⤋
If in the US, the bulb will have written on it...60W 110V
In the UK, it will read 60W 220V.
(They are not interchangeable).
2007-12-21 16:46:54 · answer #7 · answered by Norrie 7 · 0⤊ 0⤋
Voltage is set by the grid where you live- 115V in the US, 220V in Europe, etc.
2007-12-21 17:42:13 · answer #8 · answered by DT3238 4 · 0⤊ 0⤋