Equivalent Resistance of Triangular Pyramid — JEE Trick in 60 Sec! 🔥
❓ Question A wire of total resistance R is bent to form a triangular pyramid (tetrahedron) as shown in the figure, with each segment having the same length (and hence same resistance). The equivalent resistance between points A and B is given as R n . Find the value of n n . 🖼️ Question Image ✍️ Short Solution This is a classic JEE symmetry-based resistance problem . No Kirchhoff, no long equations — sirf symmetry + equivalent paths 🔥 🔹 Step 1 — Count number of equal segments A triangular pyramid (tetrahedron) has: 4 vertices 6 edges The wire of total resistance R R is bent uniformly into these 6 equal segments . So resistance of each edge : r = R 6 🔹 Step 2 — Identify symmetry in the network We are asked resistance between A and B . Important symmetry observation 👇 Points C and D are symmetrically placed with respect to A and B So their potentials will be equal 📌 Hence: No current flows in the wire CD We can safely r...