Tolongin ya No 36 sama 37 pakai cara ya

37)

diketahui :

l = 2 m

d = 1 mm = 1 x 10⁻³ m

R = 50 mΩ

ditanyakan :

ρ = ?

jawab :

R = ρ l/A

50 x 10⁻³ = ρ (2)/(πr²)

50 x 10⁻³ = 2ρ / (3,14 x (5×10⁻⁴)²)

2ρ = 50 x 10⁻³x3,14x25x10⁻⁸

ρ = 1962,5 x 10⁻¹¹ ohm

38.

diketahui :

V = 7 volt

R = 3 ohm

Ditanyakan :

P =?

Jawab :

P = V²/R

P = 7²/3

P = 49/3 =  16,3 watt