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Calculate the value of the resistance R in the circuit shown in the figure so that the current in the circuit is 0 . 2 A . What would be the potential difference between points B and E ?
ANSWERThe equivalent resistance for arm BCD is R1=5+10=15ΩThe equivalent resistance for the arm BE is R2=(1/30+1/10+1/15)−1=5The potential between points B and E is VBE=IR2=(0.2)(5)=1VNow applying KVL for left side mesh, 8−3=VBE+0.2R+15(0.2)or 5=1+0.2R+3 or R=5Ω
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