Info:
| Weerstanden in serie | | Weerstanden parallel |
Rv = R1 + R2 + R3 + ...
I = I1 = I2 = I3 = ...
U = U1 + U2 + U3 + ... | |
| 1 | = | 1 | + | 1 | + | 1 | + ... |
| Rv | R1 | R2 | R3 |
I = I1 + I2 + I3 + ...
U = U1 = U2 = U3 = ...
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Bereken de weerstand van R2.
Gegeven is dat R1 = 5 Ω, R3 = 30 Ω, de spanning over de spanningsbron = 22.5 V en de stroomsterkte = 0.375 A.
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Uitwerking:
| Gegeven | | Uitwerking | U = 22.5 V
I = 0.375 A
R2 = Rv - R1 - R3
Rv = ? | | Rv = U / I
Rv = 22.5 / 0.375 = 60 Ω
R2 = Rv - R1 - R3
R2 = 60 - 5 - 30 = 25 Ω |
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