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posted by  yummy88 on 10/12/2008 4:30:00 AM  |  status: Live  

need HELP please..Thank you..electronics

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9. determine the series resistance needed to convert a galvanometer to a voltmeter reading 15V on full scale deflection if a current of 2.5mA causes full scale deflection and the resistance of the coil is 10 ?.

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posted by Shree_vani on 10/12/2008 5:18:22 AM  |  status: Live
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yummy88's comment:
"thank you!!"
Response Details:
Data given
Galvanometer resistance Rm = 10Ω
Full scale deflection current Ifs = 2.5mA
Voltmeter range V = 15V
 
To find series resistance Rs
V = Ifs (Rs + Rm)
 
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posted by yummy88 on 10/13/2008 7:20:15 AM  |  status: Live
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thank you so much!!
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