Questions
For the network shown in the figure, the value of the current i is
a
9V35
b
5V18
c
5V9
d
18V5
detailed solution
Correct option is B
The circuit given resembles the balanced Wheatstone bridge as 46 =23Thus, middle anm containing 4 Ω resistance will be ineffective and no current flows through it.The equivalent circuit is shown as below:Net resistance of AB and BC,R'=4+2=6 ΩNet resistance of AD and DC,R''=6+3=9 ΩThus, parallel combination of R' and R" givesR= R' × R'' R' + R'' = 6 × 96+9 = 5415 = 185 ΩHence, current i=VR=V18/5 =5V18Talk to our academic expert!
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Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is
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