Longman Active Science 7

Longman Active Science 7

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(i) (m) (iii) a mm i h a b a b a Electromagnets are used in electric motors, electric bells, telephones and many other devices a€” 1 1 1 a–i 1 1 1 a–i I ... Look at the given circuit diagram and complete the sentences to understand how this bell works.

Title:Longman Active Science 7
Author:Narayanan Vidhu
Publisher:Pearson Education India - 2009-09-01


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