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The star equivalent resistance of 3 resistors having each resistance = 5 Ω is ____________(a) 1.5 Ω(b) 1.67 Ω(c) 3 Ω(d) 4.5 ΩThe question was asked during an interview.Origin of the question is Advanced Problems on Network Theorems in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer»

Correct ANSWER is (B) 1.67 Ω

To explain: We know that for STAR connection, REQ = \(\frac{R X R}{R+R+R}\)

GIVEN R = 5

So, REQ = \(\frac{5 X 5}{5+5+5}\)

= \(\frac{25}{15}\) = 1.67 Ω.



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