Question: Identical point charges ( + 2 0 mu C ) are placed at the corners of an equilateral triangle with sides of 2 .

Identical point charges (+20\mu C) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45\mu C from infinity to the midpoint of one side of the triangle? a.21J b.12J c.26J d.16J e.23J

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