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Let V and I be the readings of the voltm...

Let V and I be the readings of the voltmeter and the ammeter respectively as shown in the figure. Let `R_(V) " and "R_(A)` be their corresponding resistancce Therefore,

A

`R= V/I`

B

`R= V/(I -(V/R_V)`

C

`R= R_V- R_A`

D

`R= (V(R+R_A))/(IR_A)`

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