21.Four charges +q, -4, +q, q are placed in order onthe four consecuti

1.	21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a
Answer» EXPLANATION: bsbzbzbzbbzbzbzbzbzbz

21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a

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EXPLANATION:

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21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a​

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21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a