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In the power supply circuit, what is the role of parallel resistance and inductance?
The purpose of paralleling a resistor on the inductor is to provide a discharge circuit for the inductor to prevent the high voltage on the inductor from breaking down other devices when the switch in the switching power supply is cut off
In the series circuit of R, C and l, the inductance L, the capacitance C and the resonant frequency f0 are calculated
If inductance L = 25uh and capacitance C = 36pf, then F0 =? MHz
Please give the calculation process, I know the formula, the main unit conversion is not clear
Find the resonant frequency:
F = 1 / [2 π radical (LC)]
= 1 / [2 × 3.14 × radical (0.000025 × 0.000000000036)]
＝1/0.0000001884
≈5307856(Hz)≈5.31MHz
Are circuits with inductors or capacitors pure resistance circuits
It depends on the specific circuit. The characteristic of pure resistance circuit is that all the electric energy of input circuit must be converted into heat energy. To judge whether a circuit is pure resistance circuit, it depends on the conversion of electric energy
The voltage on the inductor can't change suddenly, and the current on the capacitor can't change suddenly. Right or wrong
On the contrary, the current on the inductor should not change suddenly, and the voltage on the capacitor should not change suddenly
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