A capacitor and a coil in an AC circuit
Answers are for parents and teachers.
1
ω = 2000 rad/s and C = 25 μF. What is X_C in Ω?
20
2
A capacitor has Uₘ = 60 V and X_C = 20 Ω. What is Iₘ in A?
3
3
L = 0.1 H and ω = 600 rad/s. What is X_L in Ω?
60
4
If the frequency increases 4 times, how do the coil reactance and current change (Uₘ constant)?
X_L increases 4 times and Iₘ decreases 4 times.
5
How do capacitor and coil have opposite dependence on frequency? Where is this useful?
X_C falls as ν rises while X_L rises; this is used in filters and in receiver circuits.