Bantu kak bsk dikumpull​

Jawaban:

R = ρ L / A

ρ = R A/L

1.

kawat yg sama ρ1 = ρ2

R1 = 4 ohm

L1 = 2 m

R2 = ?

L2 = 2m – 0,02m = 1,98m

ρ1 = ρ2

R1 A1/L1 = R2 A2/L2

penampang kawat A sama

R1/L1 = R2/L2

4/2 = R2/1,98

R2 = 3,96 ohm

2.

d1 = 10d2

A = πr² = π(d/2)² = π/4 d²

A1 = π/4 (10d2)² = 25π d2²

A2 = π/4 d2²

ρ1 = ρ2

L1 = L2

R2 = 12 ohm

R1 = ?

ρ1 = ρ2

R1 A1/L1 = R2 A2/L2

L1 = L2 maka

R1 A1 = R2 A2

R1 (25π d2²) = 12 (π/4 d2²)

R1 (25) = 12 (1/4)

R1 = 3/25 = 0,12 ohm

*maaf klo salah

*biasakan cari jawaban lain utk dibandingkan

Penjelasan: