The oscillating circuit and electromagnetic oscillations
Answers are for parents and teachers.
1
L = 1 mH and C = 1 nF: find the approximate frequency of the circuit (π ≈ 3.14).
ν = 1/(2π·√(10⁻¹²)) = 1/(2π·10⁻⁶) ≈ 159 kHz
2
C = 5 μF and qₘ = 10 μC. What is the total energy of the circuit in μJ?
10
3
L = 0.4 H and Iₘ = 0.5 A. What is the total energy in mJ?
50
4
By what factor must the capacitance be changed to halve the period?
It must be decreased 4 times.
5
Why does the conversion between electric and magnetic energy keep repeating in the circuit?
The coil maintains the current and the capacitor is recharged; in an ideal circuit no energy is lost, so it keeps shuttling.