JEE Main20202 Sep 2020Morning ShiftPhysicsCurrent ElectricityActual
Consider four conducing materials copper, tungsten, mercury and aluminum with resistivity ρ C , ρ T , ρ M and ρ A respectively. Then :
Options
- Aρ C > ρ A > ρ T
- Bρ M > ρ A > ρ C
- Cρ A > ρ T > ρ C
- Dρ A > ρ M > ρ C
Correct answer
B. ρ M > ρ A > ρ C
Step-by-step solution
ρ M = 98 × 10 - 8 Ω   m ρ A = 2 . 65 × 10 - 8 Ω   m ρ C = 1 . 724 × 10 - 8   Ω   m ρ T = 5 . 65 × 10 - 8   Ω   m