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To produce 60 watts at 120 volts, you need 0.5 amps (Watts = Volts * Amps) At 120volts, a 240ohm resistor would produce 0.5 amps (Amps = Volts / Resistance) A 60 watt bulb will have a resistance of 240 ohms. Note that this is the resistance while the bulb is hot. You might measure a different resistance if you use an ohm meter because the filament is cold.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoP = 60W = V^2 / R
60 = 144/R
R = 2.4 ohms.
Wiki User
∙ 13y agousing the equation V=IR
we rearrange to make I=V/R
the V is 12 the R is 60 so
I=12/60
I= 0.2 Amps.
I is current, V is volts and R is resistance.
Wiki User
∙ 11y agoOhm's Law
Voltage = Current x Resistance
120 /240 = .5
This is a 60 watt bulb.
Wiki User
∙ 11y agoCurrent = voltage/resistance = 12/4 = 3 amperes
Wiki User
∙ 14y agoI = E/R = 120/60 = 2 Amperes
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∙ 14y ago2 amperes
Wiki User
∙ 11y ago3.2
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If their is more bulbs in a circuit does the resistance increase?
Yes. Each light bulb is just another resistor in a series circuit, where you add the individual resistances to get the total resistance (unless the bulbs are set up in parallel, where adding a second identical light bulb would cut the total resistance in half).
Which 12 volt bulb will draw the most current when connected to a 12 volt battery?
The bulb with the lowest resistance. Current = Volts / Resistance
Why does the current in an electric circuit decrease when more bulbs are added?
If you add one extra bulb and the voltage remains constant, then you have doubled the current drained from the regulator. 12 Volt and One 12 Watt light bulb drains 1 Ampere Current. 12 Volt and Two 12 Watt light bulbs drains 2 Ampere Current. However: If having a 24 volt power source and you add two 12 Volt 12 Watt in serial, then you still only drain 1 Ampere Current. NOTE: Wattage and Voltage of bulbs may be different even if the sockets are the same. Lower voltage on the bulb will increase the current drain, if voltage is a lot lower it might cause the circuit delivering voltage to burn out or blow a fuse. It can also quickly burn the bulb, sometimes in a fraction of a second. It will however do little damage to add a bulb with higher voltage than the circuit is designed for. You will then only observe that you do not get the light you might hope for. Total Current/Ampere= Combined Wattage divided by Voltage Total Wattage = Combined Current or Ampere multiplied by Voltage. In simpler words: If you double the bulbs, twice the current is drained from the battery
Four 2.0 v cells are connected in a series to a 12 resistance light bulb If the resulting current flow is 0.62A what is the internal resistance of each cell?
This looks like V=IR to meTransposing to R = V/I and assuming that's a 12 ohm bulbLet x be the unknown part of the circuit's resistance12 + x = 8 / 0.62, so12 + x = 12.9, thereforex = 0.9 ohms.x / 4 = 0.225 ohms
How much curretn is in a circuit that includes a 9- volt battery and bulb with a resistance of 12 ohms?
Current, I is equal to V (voltage) divided by R (resistance); Hence: I=V/R = 9V/200 ohms: I = 0.045 Amps, or 45ma (milliamps).
How many amperes does a standard 60 watt light bulb use?
Watts = Volts X Amps. Amps=Watt / Volts. So, with a 240V mains, a 60W bulb draws 0.25amps. On a 12 system (car/auto) a 60W bulb draws 5 amps. On a 110V mains, a 60W bulb draws .55 Amps.
Do the same wattage light bulb have different resistance?
Yes. The resistance of a globe depends not only on the wattage of it but also on the voltage. A 12 V Globe would has a quarter the resistance of a 24 volt globe for the same wattage. (when alight)
If their is more bulbs in a circuit does the resistance increase?
Yes. Each light bulb is just another resistor in a series circuit, where you add the individual resistances to get the total resistance (unless the bulbs are set up in parallel, where adding a second identical light bulb would cut the total resistance in half).
What one is brighter a 60 watt light bulb or a 100 watt light bulb?
If the two bulbs use the same technology the 100 w bulb is 10/6 times brighter than the 60 w. Incandescent bulbs give about 10-12 lumens per watt Halgogen gives about 15-18 lumens per watt CFL (low-energy) gives about 50 lumens per watt.
What would be the resistance of a 12 volt light bulb with 55 amps flowing through it?
In theory the formula V = IR (I is current), 12/55 or approximately 0.2 ohms. But in reality the resistance probably will go to infinity, as that much current would almost certainly blow the filament. I doubt any 12 V bulb could dissipate 12*55 = 660 watts for any extended amount of time. But who knows...
Can a car battery light up a 60 watt regular light bulb with out using a power inverter?
Yes it it is a 12 volt DC light bulb. It will not operate a household 120 volt light bulb.
How much current is in a circuit that includes a 9 volt battery and a bulb with a resistance of 12 ohms?
The current depends on the total effecvtive resistance of everything connectedacross the battery.If the bulb is the only component there, then the current is E/R = 9/12 = 0.75 amperes.
How many days did it take Thomas Edison to invent the light bulb?
He invented the incandescent light bulb and it took him 12 years.
What do you need to know to calculate how much energy a light bulb uses?
Okay so I searched for 3 hours on Google and no answer so here it is: 40W - 110C; 60W 140C; 100W 136C; and 100W Flood (Red Green Yellow) 125C. Standard bulb, 117VAC, 60Hz, facing up (edison Base down, free air, 22C ambient, measured with K-type thermocouple, calibrated in last 12 months....
What is the Voltage of a signal light bulb of a lumina?
12 volts
Did it take Thomas Edison 12 years to make the light bulb?
it took Edison 15-17 years to make the light bulb
Two light bulbs of resistance R1 and R2 R2R1 are connected in series Which is brighter?
The brightness of a light bulb is related to its power. In all electrical circuits, power is equal to Voltage*Current. Since the two bulbs are connected in series, they must have equal current. The voltage across any given element in a series circuit is proportional to its resistance, so whichever bulb has the higher resistance has a higher voltage and thus higher power and is brighter.
