NEET 2002 Physics question
Identical charges are placed at each corner of a cube of side 'b' then electrical potential energy of charge which is placed at centre of cube will be
Answer: (3)
Solution
The distance from the centre of a cube of side to each corner is half the body diagonal: . Potential energy of at the centre due to the 8 charges : \dfrac{1}{4πε_0}$ =
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