Inleiding
Antwoorden

Oefening 1

 

Oefening 2

V = 60V – 18V – 12V = 30V
I = V / R = 30V / 40 = 0,75A
R1 = V / I =18V / 0,75A = 24
R2 = V / I = 12V / 0,75A = 16

Oefening 3

  1. Meter 2 = de ampèremeter
    I = V / R = V/RV = 12V / 8 = 1,5A
  2. Meter 1 = de voltmeter
    V = I · R = 1,5A · 1 = 1,5V

Oefening 4

  1. RV = 60 + 60 + 60 + 60 = 240
  2. 1/RV = 1/60 + 1/60 + 1/60 + 1/60 = 4/60 = 0,067
    RV = 1 / 0,067 = 15
  3. Rboven = Ronder = 60 + 60 = 120
    1/RV = 1/120 + 1/120 = 2/120 = 0,017
    RV = 1 / 0,017 = 60 
  4. Rmidden = 60 + 60 + 120
    RV = 1/120 + 1/60 + 1/60 = 5/120 = 0,042
    RV = 1 / 0,042 = 24

 

Oefening 5

Onderste tak: V = I · R = 0,18 · 50 = 9V
V10 = 12V – 9V = 3V
I10 = V / R = 3V / 10 = 0,3A  Itot = 0,3A
Boven tak: I = 0,3A – 0,18A = 0,12A
V30 = I
· R = 0,12A · 30 = 3,6V
VR = 9V – 3,6V = 5,4V
R = V / I = 5,4 / 0,12 = 45

 

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