bonsoir

a ) on sait que U = R × I

on a R = 22 Ω et U = 230V

I = U/R

I = 230 V / 22 Ω

I = 10.45 A

b)

P = R × I ²

P = 22 Ω × 10.45 ² A

P = 2402 .4 W

c)

on a E = p × t

P = 2402.4 W et t = 4.75 h

E = 2402.4 W × 4.75 h

E = 11411 W/h

on convertis en kW/h

ça nous donne 11.41 kW/h

bonne continuation ☺️