A copper wire joins a car battery to one of tail lamps and carries a current of 1.8A the wire has a cross section area of 0.000001m and is 6m long.calcu

Upinzani (R) wa waya unaweza kuhesabiwa kwa kutumia fomula:
R = (ρ × L) / A
Ambapo:

• R ni upinzani (katika Ohms, Ω)
• ρ ni ukinzani maalum wa nyenzo (katika Ω·m)
• L ni urefu wa waya (katika m)
• A ni eneo la msalaba wa waya (katika m²)

R = (1.68 × 10⁻⁸ Ω·m × 6 m) / 0.000001 m²

R = (1.008 × 10⁻⁷ Ω·m²) / 0.000001 m²
R = 0.1008 Ω

Jibu:
Upinzani wa waya wa shaba ni 0.1008 Ω.