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posted by  kate888 on 10/12/2008 3:51:16 AM  |  status: Live  

need help - Network analysis 1 Thank you!!

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7. what current is required for full scale deflection of a galvanometer having a current sensitivity of 50 µA per scale division? The meter is exactly 50 divisions on either side of the mid-scale index.

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posted by Shree_vani on 10/12/2008 5:40:05 AM  |  status: Live
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kate888's comment:
"thank you!!"
Response Details:
If the mid scale index is 0,
The number of divisions on one side is N = 50
Current sensitivity per division I = 50μA
The full scale deflection current is Ifs = ±NI = ± (50) (50μ) = ±2500μA = ±2.5mA
 
If the mid scale index is not zero,
The number of divisions will be (50)(2) = 100
The full scale deflection current is Ifs = (100)(50μ) =5mA
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