The equivalent resistance between points a and b in the circuit shown is: Image

Question

G1 Physics · Accepted Answer

The bridge is balanced, so the central branch carries no current. The remaining branches between a and b are equivalent to 16 Ω, 8 Ω and 8 Ω in parallel. Therefore, 1/R(eq) = 1/16 + 1/8 + 1/8 = 1/16 + 2/16 + 2/16 = 5/16 Hence, R(eq) = 16/5 = 3.2 Ω Option D follows.