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Q.

Two resistors of resistances $R_{1} = 100 \pm 3$ ohm and $R_{2} = 200 \pm 4$ ohm are conneted in parallel. Find the equivalent resistance of the parallel combination

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a

$66.7 \pm 1.8$

b

$66.7 \pm 2$

c

$300 \pm 7$

d

$\frac{200}{3} \pm 1$

answer is A.

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Detailed Solution

$\frac{Δ R_{P}}{R_{p}^{2}} = \frac{Δ R_{1}}{R_{1}^{2}} + \frac{Δ R_{2}}{R_{2}^{2}}$

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