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What is the resistance of a 10W bulb?

Updated: 9/20/2023
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13y ago

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If you're using it in your home with a voltage supply of 230V [Basically speaking], the resistance would be around 5290Ω.

The following equations can help you:

P=V*I {Where P is the power, V is the voltage and I is the current}

V=I*R {Where R is the resistance}

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Q: What is the resistance of a 10W bulb?
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Continue Learning about Physics

Which has the thickest filament - a high-resistance or a low-resistance bulb?

A low resistance bulb has a thicker filament.


Why does a motor have a bigger resistance than a bulb?

There is no particular reason why a motor should have a bigger resistance than a bulb. A motor's resistance must depend on what current it draws at the particular voltage it was designed to run on. Equally, a bulb's resistance must depend on what current it draws at the particular voltage it was designed to run on. A particular motor may have a higher resistance than one kind of bulb but that same motor may have a lower resistance than another kind of bulb.


What would happen to the current in a simple circuit if a bulb with a higher resistance were used?

Ohm's law applies: Current = Voltage / Resistance As such if you double the resistance of the light bulb you end up with half as much current.


What is the factor that affects the brightness of the bulb?

number and voltage of the cells in the circuit resistance of each bulb


Is a bulb dimmer when the wire is longer?

The resistance of a wire is proportional to its length so increasing the length would increase the resistance of the wire. The higher the resistance of a wire the lower the voltage will be across the bulb so theoretically, the bulb will be somewhat dimmer.However, the resistance of a wire is extremely low compared to that of the light bulb. Electrical wiring is designed and installed so that the wire resistance is insignificant compared to the resistance of the load, such as the bulb. In a well planned wiring system, it will be impossible to see any difference in brightness in bulbs regardless of their location in the electrical circuit. In most cases, it will require very sensitive measuring equipment to detect any difference at all.

Related questions

Which has the thickest filament - a high-resistance or a low-resistance bulb?

A low resistance bulb has a thicker filament.


What is cold resistance?

That is e.g. the resistance of a cold bulb before the bulb is lighted and heats up.


What gives the biggest resistance 3 volt bulb or 6 volt bulb?

3 volt bulb gives the biggest resistance


What does a light bulb have?

The resistance of a light bulb varies, depending on the type of bulb, the power rating, and the temperature. A typical incandescent 60 watt bulb, for instance has a cold resistance of about 30 ohms, and a hot resistance of about 240 ohms.


What is the general resistance of a tungsten filament?

The resistance of the filament in a light bulb is(voltage at which the bulb is designed to operate)2/(the rated power/watts of the bulb)


For bulbs connected in series the high watt bulb has high resistance?

No, the highest wattage bulb will have the lowest resistance.


Why does the resistance of a filament bulb depend on the current in the bulb?

The resistance of a piece of wire changes with temperature. In a filament bulb the wire is heated to about 3000 degrees C so a large change in resistance can be expected. A 240 v 105 w halogen bulb has a cold resistance of 35 ohms, but when running its resistance is 549 ohms.


What kind of batteries dose it take to run a 10w bulb?

It takes a battery that delivers the voltage that the bulb is designed for, at a current of (10/bulb voltage) amperes for a reasonable length of time.


Is the material inside a light bulb a conductor or resistance?

It has high resistance.


Why does a motor have a bigger resistance than a bulb?

There is no particular reason why a motor should have a bigger resistance than a bulb. A motor's resistance must depend on what current it draws at the particular voltage it was designed to run on. Equally, a bulb's resistance must depend on what current it draws at the particular voltage it was designed to run on. A particular motor may have a higher resistance than one kind of bulb but that same motor may have a lower resistance than another kind of bulb.


Which has a higher resistance a 5w lamp bulb or a 25w lamp bulb and how many times?

As per the formula for power (Power (Watt) = Voltage (V) x Current (i) & Resistance (R) = V / i), 25w lamp bulb would have higher resistance compared to that of 5w lamp bulb.


Does the resistance of a light bulb filament change after the light has been turned on?

The electrical resistance of a light bulb increases when it is turned on As a resistor, the tungsten light bulb has a positive resistance coefficient. This means that the electrical resistance goes up when the filament becomes hot. For example, a 100 watt light bulb operated at 120 volts - it does not matter if it is AC or DC for this calculation - will have a resistance of 144 ohms when hot and draw .833 ampere. When cold the filament typically has a resistance of only 10 ohms which increases as the filament heats up.