Question

where a torch bulb light up and where does the torch get electricity from ​

Answer 1

From the battery

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Answer 2

The torch bulb lights up when its metal tip and metal case are connected to a cell through wires. When electricity or electric current from the cell passes through the filament of the bulb, the filament gets heated too much. The filament becomes white hot and starts giving light.

Hope that it helps you...