A Light Bulb With a Resistance of 29 Ohms

When a light bulb has a characterization of 60W,
this ways that every second you use the bulb will eat 60 joules of energy. Every seedling has a resistor, and when a lite bulb has a 240 Ohm characterization,
this indicates the resistor used to control current and lower the power.

Physics is indeed difficult to understand particularly the topics related to electricity. You lot need to remember just so many things, and sometimes yous might get confused, especially on technical concepts on this 60 watts and 240 ohm light bulb.

Before we get to that, we need to understand what watts, electrical field, electric current, resistance, voltage, and other electrical terms mean.
So let’s get right to it!

What Does Watts Mean? (Ability)

The “watt” is considered a unit of ability or radiant flux. Its symbol is “Westward.”

Information technology’s known to be a method of measuring the rate of free energy existence transferred to an appliance. For case, a ane-watt low-cal bulb will modify one joule of electrical energy into light energy each 2d. Therefore, it’due south consuming one joule of energy.

So basically, watts are a measure of an apparatus’s power. It’s the electric unit of measurement for the energy produced and consumed charge per unit.
Therefore, y’all could say that power consumption is measured in watts.

There are also kilowatts (kW) that measure the power consumption for larger devices.
Ane kilowatt will exist equal to a thousand watts.

Watts is a unit of power named after the engineer James Watt. In electrical terms, a watt is a rate at which the electric work is done when one ampere (A) of current flows through one volt (5).

The formula for Watt is

Due west= A x V,


1 watt is equal to ane joule per second.

The higher the wattage will equal more ability or energy supplied to a device.

What’south Ohms? (Resistance)

On the other mitt,
Ohms in the International Arrangement of Units (SI) is
used to mensurate the electrical resistance of a material or an electronic device.

For example, i ohm is basically the corporeality of resistance in a usher through which a current of i ampere flows when a potential difference (voltage) of 1 volt is applied to the circuit.

In brusque, “resistance” measures opposition to current flow in an electrical circuit. Its symbol is

Greek letter for omega.

What’south the Resistance of The Filament Following the Doubling of its Length?

If yous look at information technology in uncomplicated terms, then
resistance is anything that can withstand a strength or an effect.
The same is the case in a circuit or a light bulb. Resistance acts equally a forcefulness that defies the electric current flow in the circuit.

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Light bulbs have a filament that holds resistance. The filament in an incandescent lite bulb doesn’t have a constant resistance. If you increase the voltage across information technology, the current will increase.

This increase in current will make the bulb hot, and that’s how it glows. And as the temperature increases, the resistance increases in a light bulb.

However, resistance and current are inversely proportional, as when the resistance of a filament in the light bulb increases,
the current flowing through the filament will subtract.

What’s an Electric Current?

The electrical current measures the menses of electric charge across a surface at one coulomb per second (ampere).

You should measure the charge in coulombs and the time in seconds. The unit of electric current is coulomb/2d (C/S) or amp.

An electric current is a stream of charged particles, such every bit electrons and ions, which motility through an electrical conductor or space. Every bit this movie takes place, in that location’s a production of heat, magnetic fields, and fifty-fifty chemical transformations.

It’southward the amount of flow charge through whatsoever cross-sectional area of a conductor.

Electrical electric current is measured using an ammeter and is described as a scalar quantity.

Electric current is what provides a light bulb with power and charge. When the bulb is hooked to a power supply, the electrical current flows through the wires and filament from one end to some other. It remains constant throughout.

Moreover, it’s related to the voltage and resistance in a circuit. The formula for current is I (current) is equal to V (voltage) divided by R (resistance). It can exist written in this form:
I = V/R.

What’s Voltage? (Current vs. Volts)

In uncomplicated words, voltage is what makes electric charges move. It can be described as the pressure that pushes the charges

through an electrical conductor.

The name “Volt” for voltage was established in honor of Alessandro Volta, an Italian physicist. An example of voltage can be the specific amount of electricity available in a circuit.

As stated earlier, moving charges can exist described every bit a
Since voltage causes the charges to move, ane tin say that voltage is causing electric current to flow in a circuit.

Voltage is considered a difference in the electric potential between two points.
At the same time, the current is regarded every bit the flow rate
of an electric charge.
Information technology’s the charge per unit at which electric charges menstruum in a circuit from 1 point to another.

Here’s a table summarizing the formulas for different electric terms:

Electrical Term Formula
Current (Ampere) I = V/R
Voltage (Volts) V = I x R
Resistance (Ohms) R = V/I
Ability (Watts) West = V x A
Electric Field E = 5/Fifty (L= length)
I promise you jot downwards these formulas in instance you might need them.

What Do Yous Mean by 60 Watt Light Seedling?

A 60 Watt rating on a light seedling indicates that it consumes joules of free energy for each second the calorie-free bulb is switched on.
Co-ordinate to this, in 60 minutes, it would mean that the calorie-free bulb used 216,600 joules of energy.

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An incandescent light seedling that’southward 60 watts gives off 800 lumens of light. On the other hand, LED bulbs, which are more efficient in terms of energy saving, are actually able to produce the same corporeality of low-cal but employ as little as x watts only.

Lumens are used to measure effulgence. And so basically, a 60 watts bulb producing 800 lumens of light shows that this is how vivid the bulb is.

Moreover, watts are
ever related to voltage. And then a sixty W low-cal seedling with its rated voltage would mean a lot.

For example, if the characterization on the bulb states “60 Westward, 220 V”, and so this would mean that it should be connected to a supply of 220 voltage, to function by consuming 60 watts.

What Do 240 Ohms in a Calorie-free Bulb Mean?

240 Ohms in a light bulb is considered the corporeality of resistance, because the measurement for resistance is ohms.

As you all know by now, the light seedling contains a filament of a certain length. And this filament acts in a mode as a resistor.

What is a resistor,
you may ask? Well, a resistor is an electrical component that stops the flow of current/electrons in an electrical circuit.

In the instance of a low-cal bulb, the filament acts as a resistor limiting the catamenia of current/electrons. Therefore, 240 ohms is the resistance that is affecting the electric current. As a effect, the lost free energy heat is generated, which produces energy in the course of light.

Using this cognition, the higher the resistance in the filament of a low-cal seedling, the college the amount of electric current/electrons will be express from flowing.

Also, the more the number of current/electrons is express, the college the corporeality of free energy will be converted to heat energy, which affects the light energy.

Close-up of bulbs.
You can say that the college the resistance of a light seedling, the brighter information technology will glow.

What’s the Resistance of a 240v 60w Bulb?

I already mentioned that it has 240 resistance. However, y’all might exist asking for its
working resistance.

We already know that
V=RI, therefore the solution will be as follows:

240=R ten 0.25



Hence the workingresistance of the bulb=960 ohms.

What’s a Filament?

A filament is considered a wire with an extremely high melting point that is an essential part of a calorie-free bulb. This part of the light bulb is crucial equally it’s the one that creates light.

Filaments e’er take to have extremely high melting points every bit the heat generated due to resistance reaches over 2000 Degrees Celsius. These high temperatures permit a filament to create the bright light that nosotros apply in our homes today.

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The common chemical element used for filaments is tungsten due to its extremely high melting point because information technology contains solid metal bonds.

The filament in a calorie-free bulb has to be sealed in a vacuum (any space that does not have any matter) to avoid burning up. Due to extremely high temperatures, any presence of oxygen in the chamber around the tungsten filament will cause the tungsten to catch burn down.

But with a lack of oxygen in its bedchamber, the tungsten filament does not catch fire and glows to illuminate our household.

There are four ordinarily used arrangements of the tungsten filament in a light bulb:

  • Quad Loop Filament
  • Spiral Filament
  • Pilus Pin Filament
  • Squirrel Cage Filament

What’s an Electric Field?

An “Electric Field” can be described as a physical field surrounding electrically charged particles and exerts a force on other charged particles.

Take a await at this video to help you empathise ameliorate what an electric field is and how information technology affects a calorie-free bulb:

An electrical field is produced in the external circuit when an external conducting excursion, like wires and a bulb, is connected to a bombardment.

Electric Field in a 60cm Filament Supplied with 120 Volts

So now that we know what an electric field is let’s understand how a potential divergence of 120 volts across a 60cm filament can give us an electrical field of 200 V/m.

It’southward important to remember that voltage is measured in Volts, and you
must measure the length in meters.
Every bit given in the statement above, the filament size is 60cm, which can also be denoted as
0.half dozen meters.

Furthermore, when it comes to an electrical field, a light seedling with 120 volts will accept a force of 200 volts per meter. To find out the electric field, one must split the voltage by the length of the filament.

Co-ordinate to Michael Faraday, using these two values, nosotros can plug them into the Electrical Field formula.

This formula is equal to the

voltage (in Volts) divided by length (in meters).

Due east = V/Fifty



This is how voltage and length are used to determine the Electric Field of a specific detail, in this instance, a filament.


Who would’ve thought that this all goes on inside a tiny low-cal bulb!

To sum it upwardly, watts and ohms contribute to your electric consumption.

They play a role from your smallest switches to your large appliances. We just used a bulb as the virtually straightforward example.

60 Watts characterization on a low-cal bulb means that for every second it’s on, it consumes 60 joules of free energy. Moreover, a 240 ohms label on the light seedling means that the current flowing through the light seedling is regulated
to that amount simply.

This can save you from fires and sudden accidents!

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A Light Bulb With a Resistance of 29 Ohms

Source: https://allthedifferences.com/60-watts-240-ohm-light-bulb/