Maximum absolute error in the sum or difference of two quantities is equal to sum of the absolute error in the individual quantities, i.e.` Z = A + B,` then `± DeltaZ = ± DeltaA ± DeltaB`
Maximum fractional error in a product or division of quantities is equal to the sum of fractional errors in the individual quantities `i.e.' 'AB or A/B,` then `(DeltaZ)/Z=+-(DeltaA)/A+(DeltaB)B`
Two resistors of resistances `R_1= 100 ± 3Omega and R_2 = 200 ± 4Omega` are connected (a) in series and (b) in parallel
Find the equivalent resistance of the parallel combination having error of `1.8Omega`.
Options:
(a) `(66 ± 1)Omega`
(b) `(66.7±1.8)Omega`
(c) `(66.3± 2) Omega`
(d) `(67± 3)Omega`