Figure 7 shows a simple electric bell circuit

      

Figure 7 shows a simple electric bell circuit
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i) Name the parts labeled:
I) D
II) E
ii) When the switch is closed, the hammer hits the gong repeatedly. Explain why?
I) The hammer hits the gong.
II) The hammer hits the gong repeatedly


  

Answers


John
i) I) Soft iron armature

II) Contact

ii) I) When current flows the soft iron core becomes magnetized and attracts the soft iron armature and the hammer hits the gong

II) When the hammer hits the gong, contact is broken and current stops flowing the soft iron core becomes demagnetized, soft armature is released and the process is repeated
johnmulu answered the question on April 19, 2017 at 08:28


Next: Figure 7 shows two similar coils P and Q around the end L and M of a piece of soft iron. A steady current passes through the coils
Previous: Two identical spring balances R and S each weighing 0.5 N are arranged as shown in Figure 2.

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