Question

The resistance of a metal is given byR=V/I , where V is potential difference and I is the current. In
I=(2+-0. 2)A
a circuit the potential difference across resistance is V and current in resistance ,

. The value of resistance in Ω with percentage error is :

Answer 1

percentage relative error in case of potential=dV/V=5/100=0.05 
% error in case of current is =dI/I=0.2/10=0.02 
error in case of resistance is -> 
dR/R=dV/V+dI/I 
dR=R(0.05+0.02) 
dR=10(0.07) 
dR=0.7 
PERCENTAGE ERROR IS=70%(In Resistance)