Question

Draw electric bell and explain its working

Answer 1

${ \bigstar} \: \: { \underline{ \bf {{ Electric \: Bell :-}}}}$

• Electric Bell is a most common application of electromagnet.

$\star$ Electric Bell works on the principle of magnetic effect of electric current.

$\dag$ Electric Bell comprises of :-

• Electromagnets ($\pmb{E}$)
• Iron strips ($\pmb{I}$)
• Switch ($\pmb{S}$)
• Hammer ($\pmb{H}$)
• Gong ($\pmb{G}$)
• Screw ($\pmb{J}$)

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$\bigstar$ Diagram is attached in the attachment.

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${ \pink \bigstar} \: \: { \underline{ \bf{ \blue{Working \: of \: an \: Electric \: Bell :-}}}}$

• Whenever we press the switch button of the bell, electric current flows through the coil and gets transported into the electromagnet.

• The electromagnet attracts the iron strip & the hammer attached to the strip which hits the gong, and produces a sound.

• When iron strip moves to the electromagnet, then it no longer touches the screw and finally it breaks down (when switch is on 'OFF' mode), and henceforth it no longer attracts the iron strip.

• After this, the iron strip returns back to its initial position, while touching the screw again & again. This process makes the circuit to complete and thus, the current flows once more. It also develops a magnetic field, so as the iron strip gets captivated and the hammer hits the gong again.

• All the above working of an Electric Bell are repeated in a quick series of things, as long as you keep that switch pressed and hence, bell rings constantly.⠀

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Answer 2

$\large\star$$\boxed{\rm\underline\pink{Components~of~an~Electric~bell}}$$\large\star$

• A coil of wire wound over an iron piece that forms the Electromagnet.

• An iron strip (soft iron armature) which has a hammer attached to it which is joined to the wire coil.

• A contact screw through which is the attached to the iron strip.

• A battery which connects the wire coil and the contact which.

• A switch in the middle of the circuit.

$\large\star$ Electric Bell compromises of :

• $\longmapsto$Electromagnet $\large\bold{\rm{(E)}}$
• $\longmapsto$Iron strips $\large\bold{\rm{(I)}}$
• $\longmapsto$Switch $\large\bold{\rm{(S)}}$
• $\longmapsto$Hammer $\large\bold{\rm{(H)}}$
• $\longmapsto$Gong $\large\bold{\rm{(G)}}$
• $\longmapsto$Screw $\large\bold{\rm{(J)}}$

$\large\star$$\boxed{\rm\underline\purple{Working~of~an~electric~bell}}$$\large\star$

• When the switch of the Bell is ON, an electric current flows through the coil of wire which makes the iron piece attached to it act as an Electromagnet.

• As a result, the Iron piece attracts the hammer towards itself. The hammer thus hits the bell and a sound is produced.

• As the hammer move towards the iron piece, it moves away from the contact screw which breaks down the circuit.

• As the circuit breaks the wire coil stops receiving any current which makes the electromagnet lose its magnetic effect.

• As a result, the hammer falls back to its original position.

• Then as the hammer falls back the iron strip again comes in contact with the contact screw and the circuit gets completed.

• This again turns the iron piece into an electromagnet and the whole process continues until the bell is switched OFF. This results in the continuous ringing of the bell.

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[ NOTE : Diagram is in the attachment. $\uparrow$ ]

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