Working of an Electric Bell - A Complete Guide
Have you ever approached the door of a house, seen no one outside, and noticed a small button—the bell switch—waiting to be pressed? With a simple touch, you hear a distant ring, and moments later, someone comes to greet you. It’s a familiar, almost automatic interaction that we often take for granted. Yet, behind that button press is the clever mechanism of an electric bell, silently working to bridge the gap between you and the person inside.
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- What is an Electric Bell?
- Electric (door) Bell diagram
- How to Draw Electric Bell (easy diagram)
- Principal on Which Electric Bell Works
- Working of Electric bell
This simple act—pressing a button and hearing a bell ring—demonstrates the power of electromagnetism in action, transforming an invisible electrical pulse into a sound that prompts a response. Whether it’s at the front door, in schools signalling class changes, or as part of security alarms, the electric bell is a perfect example of how technology makes daily life more efficient and connected.
In this article, we will study a very important concept of class 7 in physics, the electric bell and the electric bell diagram. So, the topics that we are going to cover in this article are what is an electric bell, the electric (door) bell diagram, and the principles on which an electric bell works, we will explain the working of an electric bell that is how does an electric bell works, electric bell diagram, how to make an electric bell, circuit of an electric bell and what is electromagnet and how electromagnet is used in electric bell.
Let’s start with our topics one by one to help you understand the concept easily.
What is an Electric Bell?
Bell – bells are instruments that generate vibrations or sound when triggered. There are many types of bells like a temple bells, school bells alarm clock bells and doorbells etc.
In class 7 we are understanding how an electric bell works mainly.
Definition of Electric Bell- An electric doorbell is a bell that is used usually in our homes, and after pressing the switch, the circuit working on the principle of electromagnet is completed hence leading to the triggering of the sound.
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Electric (door) Bell diagram
Electric bell is a circuit of various parts like a gong, electromagnet, hammer, adjusting screw, armature, metallic strip, switch and a battery for bell.
As we can see in this diagram of electric bell one end of the electromagnet is connected to the terminal t1 that is switch of the circuit and another is connected to second terminal t2 that is battery of bell. When the hammer at the top touches the adjusting screw, the steel rod functions as a spring hence, the hammer contacts the other terminal of the battery and that’s hoe this circuit performs its individual function.
Now, let’s see how to draw a labelled diagram of working of electric bell.
How to Draw Electric Bell (easy diagram)
This is the image of the easy bell diagram.
Principal on Which Electric Bell Works
Electric bell works mainly on the principle of an electromagnet which is the magnetic effects of current.
So, before knowing the principle we all should be aware of the term electromagnet because the electric bell has electromagnet as its main component.
What is Electromagnet?
An electromagnet is a type of magnet, used in an electric bells, in which wire is wounded around the soft metal core and by passing the current through it, that metal core acts like a magnet. Hence, in this magnetic field is being generated by flowing electric current through the surface of metal core.
Generally, an iron rod is used as a metal core for the purpose of making an electromagnet.
The core of the electromagnet is usually made up of soft iron rods because of two reasons mainly, first is that it increases the intensity of the magnetic field of electromagnet and the second reason is that it easily gets demagnetized, when no current flows in the turns of the coil of insulated copper wire wound over the core, hence, leading in the flowless working of an electric bell. This is the reason why the electric bell has an electromagnet.
Also Read: NCERT solutions for Class 7 Physics Chapter 14 Electric Current and its effect
Working of Electric bell
The electric bell contains an electromagnet which is being insulated with wire coils wound around iron rods. Through the coils when the electric current flows the magnetic field is hence created by the electromagnet which pulls the armature towards it which leads to the striking of bell. So, due to the flow of the electric current through the coils the iron rods of electromagnets become magnetic in nature. The piece of an iron which is connected to the clapper attracts the iron rod to itself. And when that clapper triggers the bell the bell rings or make sound.
Till now, we have seen the construction and working of electric bell for class 7 of the electric bell.
At last, we have covered all the topics what is an electric bell, electric (door) bell diagram, principal on which electric bell works, we will explain working of an electric bell that is how does an electric bell works, electric bell diagram, how to make an electric bell, circuit of an electric bell and what is electromagnet and how electromagnet is used in electric bell.
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Frequently Asked Questions (FAQs)
The electric bell was invented by Joseph Henry, an American scientist, in the 1830s
- Scientific equipment used in preserving cultures.
- Replacement of classical bells.
- Variety of uses with numerous needy and important features.
- Live broadcasting via microphones are done.
- Less weight without any risk of structural failure.
The important characterstics of an electromagnet are:
(I) an electromagnet is temporary in nature that is, it can be demagnetized when magnet is not in use.
(ii) an electromagnet is made of a soft iron core rod because of it’s nature.
(iii) the magnetic field strength can be changed by various methods like by increasing number of turns on solenoid or by increasing the current in the circuit.
(iv) an electromagnet can be easily demagnetized in a very less interval of time by switching off the current.
No, bulb does not have electromagnet in it. It’s rays are electromagnetic radiations because of light’s nature.
The electromagnet attracts the hammer. Electric bell contains making and breaking of the switch, which the iron armature keeps the bell ringing. It breaks the circuit, so a current no longer flows and hence, making the electric bell ring again and again.
In electric bulb, the filament of the bulb produces light because of the heating effect of electricity. The filament of bulb is usually made of tungsten metal; whose melting point equal to 3380°c so that it does not melt easily.
The working of an electric bell for Class 7 students is based on the concept of electromagnetism.
An electric bell is a mechanical device that uses electrical energy to produce sound. It works on the principle of electromagnetism. When electricity flows through an electromagnet, it creates a magnetic field, which moves a striker or hammer to hit a bell and produce a ringing sound.
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07 Oct'24 10:35 AM