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Fill in the blank: ideal voltage source and ideal current source are connected in series, and their equivalent circuit is______ The ideal voltage source and resistor are connected in parallel, and its equivalent circuit is_____ .
-------It is current source
If a resistor is connected in series with the ideal current source, will it affect the voltage and current in the original external circuit?
Yes
Why is the current equal everywhere in series circuit and the voltage equal in parallel circuit
Won't a part of the current be lost when it passes through an electrical appliance?
In a series circuit, the current is equal everywhere because there is no branch in the series circuit, but only one path. Moreover, the charge will not accumulate anywhere in the circuit, so the number of charges passing through any section of the circuit must be equal at the same time, that is, the current flowing through each series resistor is the same
Why is capacitor charging equivalent to short circuit
Why is it equivalent to open circuit after charging
Because the voltage at both ends of the capacitor can't change suddenly, the voltage at both ends of the capacitor is 0 when it is turned on. When it is turned on, its voltage can't change suddenly, it's still 0V. At this time, the current of the power supply is equal to the no-load voltage of the power supply divided by the internal resistance of the power supply, which means that the power supply is short circuited
RELATED INFORMATIONS
- 1. Why is capacitor equivalent to short circuit at the moment of power on?
- 2. How to judge whether the circuit is short circuit or open circuit from the presence of voltmeter and current indication Students said that in the series circuit, the small light bulb is not on. When the ammeter in series with the small light has a number, the small light is not normal. If the ammeter has no number, it means that the small light is OK. Is he right? Explain it. Thank you
- 3. What is the difference between voltage source and current source? Voltage source and current source are the same power supply. I don't know the difference between them. Please answer in detail. Thank you!
- 4. 1. If the external resistance of the ideal current source increases gradually, its terminal voltage () A. Gradually increase B. gradually decrease C. D. constant Better explain why
- 5. The b value of triode is the parameter reflecting the ability, which is () a voltage control voltage B current control voltage C voltage control current D current control current
- 6. Is electromotive force equal to supply voltage
- 7. When the power supply is connected to the circuit, the potential difference between the two ends of the power supply is equal to, less than and greater than the electromotive force of the power supply Such as the title
- 8. What is the electromotive force of the power supply equal to the voltage between the two poles of the power supply when the power supply is open Such as the title Why is it not the voltage between the two poles of the power supply when the circuit is connected?
- 9. Why is it that if the voltage indication number is zero, the circuit of the measured part is short circuited
- 10. A physics problem: there are four resistances, R1 = 1, R2 = 2, R3 = 3, R4 = 4, e = 4V, r = 0.2, total current ——R1——R3—— | | | ——R2——R4—— | | ——||————— R1 and R3 are in one branch, R2 and R4 are in one branch, that is to say, they are connected in series and then in parallel, and there is another line between R1 and R3 and between R2 and R4 The general circuit diagram is like this. The lines in the diagram are all connected Is the middle line useless?
- 11. Electrotechnics: the difference between power model and ideal voltage source and ideal current source When the three resistors are connected in series, the voltage and current of the resistor are independent of the voltage source and can be removed
- 12. What determines the voltage at both ends of an ideal current source for circuit analysis What determines the voltage at both ends of an ideal current source The voltage at both ends of the ideal voltage source is determined by ()
- 13. When the voltmeter is paralleled in the circuit under test, what are the consequences of open circuit and short circuit of the voltmeter to the circuit? Forget to say, what if the voltmeter is in series? There are two consequences
- 14. If the power supply is short circuited, the voltmeter will be connected in parallel at both ends. Will the voltmeter be burnt out and display the power supply voltage
- 15. What is the difference between power short circuit and electrical short circuit Short circuit why have cent power source short circuit and use electric appliance short circuit! What is the difference between them after all?
- 16. What's wrong with short circuit of power supply and electric appliance?
- 17. Can a short circuit burn out the power supply? If the total resistance of dry cell (3V) in parallel circuit is less than 0.1 Ω, can it burn out?
- 18. The electromotive force of the power supply is 3V, the internal resistance is 0.1, and the external resistance is 1.4
- 19. The electromotive force of the power supply is 3V, and the internal resistance is 0.2 Ω. When the external circuit is open, the current and terminal voltage in the circuit are
- 20. The electromotive force of the power supply is 1.5V, the internal resistance is 0.2 Ω, and the resistance of the external circuit is 1.3 Ω be deeply grateful