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The circuit diagram what does the symbol made of two long lines into sure lines with a positive and a negative sign at each end represent

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AL2006

I think you're describing the symbol that I put down at the bottom of this answer.

If that's symbol you mean, it represents a battery.  The plus is the longer line, for the positive terminal.  The minus is the shorter line, for the negative terminal.

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shaniyax12p7nl2u

B I think is the answer

XD