Electrical instruments calculation 3
Question = एक shunt resistance लगा ammeter 500 mA पर पूरे scale की reading देता हैं । यदि shunt का resistance 0.1021 Ω हो और meter पर voltage 50 millivolt हैं तो meter का resistance मालूम करें ?
Solution = is given ,
» VL = 50 mA , या 50 ÷ 1000 = 0.05 v , R = 0.1021 Ω , I = 500 mA , या 500 ÷ 1000 = 0.5 A ,
» shunt resistance का current = V ÷ R , = 0.05 ÷ 0.1021 , = 0.489 ampere
» तो extra current = 0.5 - 0.489 = 0.01 ampere ,
» So , shunt resistance होगा = V ÷ I , = 0.05 ÷ 0.01 ,= 5 Ω , answer ✓
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