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What's wrong with short circuit of power supply and electric appliance?
There is no electrical appliance (resistor) in the short circuit circuit of power supply, but the positive and negative poles of power supply are directly connected with a wire
Short circuit of electrical appliances is simply that the two ends of a wire are respectively connected to the two ends of the resistance part (working part) of electrical appliances. The current flows directly from the wire, and no current passes through the resistance part of electrical appliances
How to call with electrical short circuit, power short circuit
(1) Electrical short circuit: in a circuit, use a wire to connect the two ends of an electrical appliance (such as a light bulb). When the switch is turned on, because the resistance of the wire is almost zero, the current will flow through the wire instead of passing through the electrical appliance. We call it electrical short circuit. If the light bulb is not used, it will not light up
What's the difference between short circuit of power supply and short circuit of electrical appliances? Aren't they all short circuits?
It is helpful for the responder to give an accurate answer
My understanding is as follows: for a circuit including power supply and power consumption, the power supply part can be understood as power supply, and other parts can be regarded as electrical appliances. For example, take the computer host as an example, its power box can be said to be the power supply of the whole machine, which outputs all kinds of DC voltage. Power short circuit means that there is at least one DC
RELATED INFORMATIONS
- 1. 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?
- 2. 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
- 3. 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
- 4. 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 ()
- 5. 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
- 6. 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_____ .
- 7. Why is capacitor equivalent to short circuit at the moment of power on?
- 8. 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
- 9. 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!
- 10. 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
- 11. 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?
- 12. The electromotive force of the power supply is 3V, the internal resistance is 0.1, and the external resistance is 1.4
- 13. 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
- 14. 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
- 15. Connect two resistors of 12 and 40 ohm into the circuit. The total resistance is () ohm. When the current through 10 ohm resistor is 0.5 A, the power supply voltage is () V, the current through 40 ohm resistor is () a, and the main circuit current is () a
- 16. The internal resistance of the voltmeter is very large. The ordinary small bulb is equivalent to a wire. Why is it not short circuited when the voltmeter measures the voltage of the small bulb?
- 17. The voltage at the circuit end measured by Voltmeter is zero, which means that () 1 external circuit is open circuit, 2 external circuit is short circuit, 3 current on external circuit is relatively small, 4 resistance in circuit is zero
- 18. When the heater is not connected, the voltage is 210v. When the heater is connected, the voltage drops to 200V? In winter, after Li Ming plugged in the electric heater, he found that the light in the room was dim. He used a voltmeter to measure the power supply voltage. The result showed that the voltage was 210v when the heater was not connected. The voltage dropped to 200V when the heater was connected. The electric heater he used was marked with "220V, 1000W". From this, we can know the resistance of the power supply circuit__________ Ω, the actual power of the electric heater is____________ W. It's the resistance of the power supply circuit, not the resistance of the heater. 2.54 Ω, 826.4 w
- 19. How many hours can two 220 V, 40 W lamps work with one degree of electricity? How many hours can two "220 V, 40 W" lamps work with one degree of electricity? I can't get the formula right now
- 20. Assuming that there are two bulbs in series (or in parallel), one is brighter than the other, then their actual electric power, rated power, actual voltage, rated voltage What is the relationship between actual current, rated current, actual power at the same time and rated power Please give the best explanation of the pushing process