In the symmetric resistor network shown in the original question figure, every resistor has resistance R. If the equivalent resistance across A and B is NR/2, find N.
Physics · Current electricity · equivalent resistance
JEE Mains 2025 22 Jan Evening Shift

Question

In the symmetric resistor network shown in the original question figure, every resistor has resistance R. If the equivalent resistance across A and B is NR/2, find N.

G1 Physics · Accepted Answer

By symmetry, the supplied solution gives R e q = ( 3 R / 4 ) × 2 = 3 R / 2. R_eq=(3R/4)×2=3R/2. R e ​ q = ( 3 R /4 ) × 2 = 3 R /2. Comparing with NR/2 gives N=3.