A wire of length 25 m and cross-sectional area 5 ~mm ^2 having resistivity of 2 10⁻⁶ ~m is bent into a complete circle. The resistance between diametrically opposite points will be

Step-by-step solution

aligned & L =25 ~m , ~A =5 ~mm ^2=5 10⁻⁶ ~m ^2 & =2 10⁻⁶ ~m & R _ wire = L ~A = 2 10⁻⁶ 25 5 10⁻⁶ =10 & R _ eq = R 4 = 10 4 =2.5 aligned Answer does not match with NTA option.