Фізика 11. Розв'язування задач «Вільні електромагнітні коливання в ідеальному коливальному контурі»

Physics 11th grade. Presentation for lesson 36 on solving problems on the topic "Free electromagnetic oscillations in an ideal oscillatory circuit. Thomson's formula". Distance learning: Physics -   / physics.ukr   Purpose of the lesson: Educational. To consolidate knowledge on the topic "Free electromagnetic oscillations in an ideal oscillatory circuit. Thomson's formula", to continue to form skills and abilities to solve physical problems, applying the knowledge gained. Developmental. To develop the ability to correctly allocate time; independence in learning; the ability to independently apply rules and laws. Educational. To educate discipline, honesty, responsibility. Online lesson for distance learning from the project "Physics Online". Based on the book "Physics 11" edited by V. G. Baryakhtar, S. O. Dovgy. Some materials for this video are taken from the website FIZIKA NOVA www.fizikanova.com.ua If you liked it, don't forget to like, subscribe and share the video with those who might also be interested in it. 00:00 Problem solving lesson on the topic "Thomson's formula. Free electromagnetic oscillations in an ideal oscillatory circuit" 00:17 Determine the period of free electromagnetic oscillations in an oscillatory circuit consisting of a coil with an inductance of 15 μH and a flat capacitor, two plates of which with an area of 48 cm2 each are located at a distance of 1 cm, and the space between them is filled with paraffin. 07:03 An ideal oscillatory circuit consists of a capacitor of 1 μF and a coil with an inductance of 10 mH. What is the maximum charge on the plates of the capacitor if the maximum current in the coil is 100 mA? 12:38 The same capacitor is connected in parallel to the capacitor included in the oscillatory circuit. How will the period of electromagnetic oscillations in the circuit change? 17:07 Another capacitor is connected in parallel to the capacitor in the oscillatory circuit, the capacitance of which is three times greater than the capacitance of the first, after which the frequency of electromagnetic oscillations in the circuit decreased by 300 Hz. Determine the initial frequency of oscillations in the circuit. 23:40 The amplitude value of the current is 40 mA, and the frequency is 1 kHz. Determine the instantaneous value of the current after 0.1 ms from its zero value. 28:19 The oscillatory circuit consists of a capacitor with a capacitance of 200 pF and a coil with an inductance of 40 μH. The capacitor is charged to 150 V. Determine the current in the circuit at the moment when the voltage across the capacitor plates is 50 V. 36:36 The current in an oscillating circuit varies according to the equation i=0.2 cos⁡〖2∙10^3 t〗, where all values are given in SI units. The inductance of the coil is 125 mH. Determine the amplitude of the voltage across the capacitor. 43:54 The period of free electromagnetic oscillations in a circuit consisting of a coil with an inductance of 40 mH and a flat capacitor with an area of each plate of 25 cm2 is 5 μs. Determine the thickness of the mica layer filling the space between the capacitor plates. 45:04 How much did the capacitance of the capacitor change if the oscillation period doubled when the inductance of the coil increased by 3.2 times? The initial capacitance of the capacitor was 200 nF.