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Solved Problems-3

Problems-3
Find the current through the galvanometer using delta-star conversion.
 
Description: 1588.png
 
Solution
Converting the delta consisting of 20 Ω, 30 Ω and 50 Ω, we get,
Description: 4069.png
 
Description: 4075.png
 
Description: 4081.png
 
∴ RAC = 16 Ω
 
Description: 683.png
 
Description: 1610.png
 
Main current Description: 4087.png
 
Now, to calculate potential difference between the points B and D ;
 
VXC = 10 × 0.5 = 5 V
 
∴ VBD = (10 × 0.25 – 5 × 0.25) = 1.25 V
 
∴ Currant through the galvanometer, (50 (Ω)
 
Description: 4093.png

 





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