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Q.1 1. નીચેનામાંથી કયું ઘર્ષણ દ્વારા સરળતાથી વીજભારિત થતું નથી ?
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Q.2 2. જ્યારે કાચના સળિયાને રેશમનાં ટુકડા સાથે ઘસવામાં આવે છે, ત્યારે સળિયો —