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An electric bell has a resistance of 552 and requires a current of 0 25...

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An electric bell has a resistance of 552 and requires a current of 0 25 A to work it Assuming that the resistance of the bell wire is 192 per 15m and that the bell push is 90m distance from the bell How many cells each of emf 1 4V and internal resistance 202 will be required to work the circuit A 3 B 4 C 5 D Can t be determined

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