વિદ્યુતક્ષેત્ર $\mathop E\limits^ \to \,\, = \,\,{e_1}\,\hat i\,\, + \,\,{e_2}\,\hat j\,\, + \,\,{e_3}\,\hat k\,\,\,\,\,\,\,\mathop r\limits^ \to \,\, = \,\,a\,\hat i\,\, + \,\,b\,\hat j\,\,$ મી છે .થતું કાર્ય............છે.
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