James Prescott Joule: james prescott joule ek prtibhashali british bhotik vigyani the! We apne vdyut tatha ushmagtiki ke anusandhano ke liye vishesh rup se prasidh hue! Anye vicharo ke atirikt unhone vidhut ke usmiy prbhaw ke bare mein niyam banaya! Unhone urjaa snrakshan niyam ko pryogatmak rup se satyapit kiya tatha ushma ke yantrik tulyankan ke maan ki khoj ki! Urjaa tatha karye ke matrak ka nam jul,unhi ke samman mein rakha gaya hai!
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