JEE MAIN - Physics (2020 - 2nd September Morning Slot - No. 4)
Consider four conducting materials copper,
tungsten, mercury and aluminium with
resistivity $$\rho $$C, $$\rho $$T, $$\rho $$M and $$\rho $$A respectively. Then :
$$\rho $$C > $$\rho $$A > $$\rho $$T
$$\rho $$M > $$\rho $$A > $$\rho $$C
$$\rho $$A > $$\rho $$T > $$\rho $$C
$$\rho $$A > $$\rho $$M > $$\rho $$C
Explanation
ρM = 98 × 10–8
ρA = 2.80 × 10–8
ρC = 1.72 × 10–8
ρT = 5.65 × 10–8
$$ \therefore $$ $$\rho $$M > $$\rho $$T > $$\rho $$A > $$\rho $$C
ρA = 2.80 × 10–8
ρC = 1.72 × 10–8
ρT = 5.65 × 10–8
$$ \therefore $$ $$\rho $$M > $$\rho $$T > $$\rho $$A > $$\rho $$C
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