1.Units, Dimensions and Measurement
easy

અવરોધ  $R_1 = 300 \pm 3\Omega $ અને અવરોધ  $R_2 = 500 \pm 4\Omega$  ને શ્રેણીમાં જોડવામાં આવે, તો આ જોડાણનો સમતુલ્ય અવરોધ કેટલો થાય ?

A

$(800 \pm 1) \,\Omega $

B

$(800 \pm 7) \,\Omega $

C

$(200 \pm 7) \,\Omega $

D

$(200 \pm 1) \,\Omega $

Solution

The equivalent resistance of series combination

is $R_{s}=R_{1}+R_{2}=300 \mathrm{W}+500 \mathrm{W}=800 \mathrm{W}$

The error in equivalent resistance is given by

$\Delta \mathrm{R}=\left(\Delta \mathrm{R}_{1}+\Delta \mathrm{R}_{2}\right)=(3+4) \mathrm{W}=7 \mathrm{W}$

Hence, the equivalent resistance along with

error is $(800 \pm 7) \Omega$

Standard 11
Physics

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