A wire has a resistance of 5 ohm. If it is cut into two equal parts and connected in parallel, the equivalent resistance is?
Q1. A wire has a resistance of 5 ohm. If it is cut into two equal parts and connected in parallel, the equivalent resistance is?
Answer: 1.25 ohm
Explanation: Each part has resistance 2.5 ohm. In parallel, 1/R = 1/2.5 + 1/2.5 = 2/2.5, so R = 2.5/2 = 1.25 ohm.