4) R.total = RS + RP :
= (25 + 25)Ω + (1/50 + 1/75)Ω
= 50Ω + (3/150 + 2/150)Ω
= 50Ω + 5/150Ω
= 50Ω + 150/5Ω
= 50Ω + 30Ω
= 80Ω
5) (6 + 4) = (2 + 3) + PC
10 = 5 + PC
5 + PC = 10
PC = (10 - 5)A
PC = 5A
6) R = V²/P
25 = (220)²/200
25 = (220(220)/200
25 = 48.400/200
25 = 242
x = 242/25
x = 9,68 meter
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Verified answer
4) R.total = RS + RP :
= (25 + 25)Ω + (1/50 + 1/75)Ω
= 50Ω + (3/150 + 2/150)Ω
= 50Ω + 5/150Ω
= 50Ω + 150/5Ω
= 50Ω + 30Ω
= 80Ω
5) (6 + 4) = (2 + 3) + PC
10 = 5 + PC
5 + PC = 10
PC = (10 - 5)A
PC = 5A
6) R = V²/P
25 = (220)²/200
25 = (220(220)/200
25 = 48.400/200
25 = 242
x = 242/25
x = 9,68 meter