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→Activity No 1
* '''Prerequisites/Instructions, if any'''
* '''Prerequisites/Instructions, if any'''
1. Do not use A.C. current
1. Do not use A.C. current
[[File:HEATING-EFFECT-OF-CURRENT.jpg|400px]]
2. make a copper spring carefully
2. make a copper spring carefully
3. use only the thin copper wire.
3. use only the thin copper wire.