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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 ?

Calculate the value of the resistance R in the circuit shown in the figure so that the current in the circuit is 0.2A. What would be the potential difference between points B and E?

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Grade:12th pass

1 Answers

ankit singh
askIITians Faculty 614 Points
3 years ago

ANSWER

The equivalent resistance for arm BCD is R1​=5+10=15Ω

The equivalent resistance for the arm BE is R2​=(1/30+1/10+1/15)−1=5
The potential between points B and E is VBE​=IR2​=(0.2)(5)=1V
Now 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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