For a 20.3V sclae voltmeter V 20.3 =I [ R 1 + R c ] ------(1) For a 30.4V sclae

Question

For a 20.3V sclae voltmeter         V20.3 =I [ R1 + Rc ] ------(1)    For a 30.4V sclae voltmeter         V30.4=  I [ R2 + Rc ] -------(2)     V30.4 - V20.3 = I(R2 - R1 )            I = 30.4v - 20.3V / ( 3050 )              = 0.0033A the value of Rc is          Rc= ----- Solve it I hope it helps you

Is what was given to me. I saw this original answer withdifferent numbers. I am just not understanding how to setupthe question and need a little more guidance.
Solve it I hope it helps you

Is what was given to me. I saw this original answer withdifferent numbers. I am just not understanding how to setupthe question and need a little more guidance.

Explanation / Answer

   resistance is conneted in series withgalvonometer to get volt meter from above problem resistance are in sereies so resultant resistance R=R1 + Rc    then applyin g ohm s law we can findRc = ------- in voltmeter sereis resistance R = V/ig so V = Rig so V = Rig

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