General Science Vidyut Dhara Ka Chumabakiya Prabhav Sarwapratham Awlokit Kiya Gaya ?

विद्युत धारा का चुम्बकीय प्रभाव सर्वप्रथम अवलोकित किया गया ? - The magnetic effect of electric current was first observed in? - Vidyut Dhara Ka Chumabakiya Prabhav Sarwapratham Awlokit Kiya Gaya ? General Science in hindi,  Physics Orastade Dwara question answers in hindi pdf  Ferade Dwara questions in hindi, Know About Henry Dwara General Science online test General Science notes in hindi quiz book    volta Dwara