Question

If the wire of length 2 m and area of cross section 2 mm2 has resistivity of 20 × 10-12 Ω m, find its resistance

Answer 1

Answer:

Explanation:

LENGTH ,L = 2 M

AREA = 2 MM²

          = 2*(10⁻³)²

          = 2*10⁻⁶ M²

RESISTIVITY ,ρ = 20*10⁻¹² OHM M

RESISTANCE , R =?

FORMULA:

RESISTANCE = RESISTIVITY *LENGTH/AREA

R = ρ *L/A

R = 20*10⁻¹²*2/2*10⁻⁶

R = 20*10⁻¹²*10⁶

R = 20*10⁻⁶

R = 2*10⁻⁵ OHMS.

RESISTANCE OF THE WIRE = 2*10⁻⁵ OHMS.

HOPE THIS HELPS.