Question

Figure showns a network of eight resistors numbered 1 to 8, each equal to `2 Omega`, connected to a `3 V` battery of negligible internal resistance. The current `l` in the circuit is

A. `0.25 A`
B. `0.5 A`
C. `0.75 A`
D. `1.0 A`

Answer 1

Correct Answer - D
(d) We convert the deltas `ABE` and `CDF` to stars.
Equivalent resistance `= (R )/(3) + (5R)/(6) + (R )/(3) = 1.5 R`
`I = (V)/(1.5 R) = (3)/(1.5 xx 2) = 1A`