
LAP Mathe 1
Authored by Horst Ortmann
Mathematics
Professional Development
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wie groß ist der Gesamtwiderstand eines 30 m langen Kupferkabels mit 0,75 mm² Querschnitt? (ρ = 0,0178 Ω·mm²/m)
Answer explanation
R = (ρ * l) / A = (0,0178 * 30) / 0,75 ≈ 0,712 Ω
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Ein Verbraucher benötigt 5 A Strom. Wie groß ist der Spannungsabfall bei 0,712 Ω Leitungswiderstand?
Answer explanation
U = R * I = 0,712 Ω * 5 A ≈ 3,56 V
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wie viel Leistung benötigt ein Switch mit 0,2 A bei 12 V?
Answer explanation
P = U * I = 12 V * 0,2 A = 2,4 W
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wie viel Energie verbraucht eine Festplatte mit 0,5 A bei 5 V in 2 Stunden?
Answer explanation
P = 5 V * 0,5 A = 2,5 W → E = 2,5 W * 2 h = 5 Wh
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wie lange dauert ein 500 MB Download ungefähr bei 20 Mbit/s effektiver Datenrate?
Answer explanation
500 MB = 4000 Mbit → t = 4000 / 20 = 200 s
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Drei Widerstände (100 Ω, 220 Ω, 330 Ω) in Reihe – Gesamtwiderstand?
Answer explanation
R = 100 + 220 + 330 = 650 Ω
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wie viele Hosts sind in einem /28-Subnetz maximal möglich?
Answer explanation
2^(32-28) - 2 = 14 Hosts
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