JEE Main20244 Apr 2024Evening ShiftPhysicsCurrent ElectricityActual
Two wires A and B are made up of the same material and have the same mass. Wire A has radius of 2.0 ~mm and wire B has radius of 4.0 ~mm . The resistance of wire B is 2 . The resistance of wire A is _____ .
Correct answer
0
Step-by-step solution
aligned & R = A = V A ^2 & R _ A R _ B = A _ B ^2 ~A _ A ^2 = r _ B ^4 r _ A ^4 & R _ A 2 = [ 4 10⁻³ 2 10⁻³ ]^4 & R _ A =32 . aligned