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Why is the total electric power divided by the supply voltage not equal to the circuit current in a series circuit? Why is the power divided by the voltage not equal to the circuit current?
Not pure resistance circuit, not pure resistance circuit is in the state of power on, there is heat, there are other forms of work to the outside except internal energy! Generators, motors, fans, electrolyzers, in addition to heat, but also external work, so these are non pure resistance circuit. Note: in non pure resistance circuit, not applicable
Electric energy can be converted into internal energy by electric current
This sentence is right. Can it be done in reality?
Electric energy is transformed into internal energy, which is reflected in heating. In reality, there are many such examples, such as rice cooker, electric stove, electric iron, electric kettle, electric blanket, etc
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- 1. When a resistor is connected to a circuit, the consumed power is 110W. When 3C charge is passed, 330j of electric energy is converted into internal energy, then () A. The voltage applied to the resistor is 330vb. The current through the resistor is 1Ac. The power on time of the resistor is 3SD. The resistance value of the resistor is 110 Ω
- 2. When calculating the power of resistance and the current and resistance in closed circuit, why are the relevant formulas pure resistance If the non pure resistance does not conform to Ohm's law, please explain why
- 3. The calculation of the voltage in the circuit with resistor diodes and light emitting diodes in series In 12V DC power supply circuit, 1K resistor, diode 4007 and a LED are connected in series, how much is the circuit current, how much is the voltage at both ends of the diode and the LED, and how much is the voltage at both ends of the LED Is the voltage drop of the diode the terminal voltage at both ends of the diode?
- 4. Using 5.5V voltage with 3V 20mA LED bulb resistance value Should I use a resistor with U / I = R (5.5 / 0.02 = 275), or a resistor with (input voltage output voltage) / current = (5.5-3) / 0.020 = 125 ohm, or some other resistor? Give me a value and the solution to this problem in the future,
- 5. How much resistance does it take to connect 1 LED (light emitting diode) in series with 24 V voltage
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- 7. If the light bulb is short circuited, does the voltmeter and ammeter show the number?
- 8. What is open circuit, short circuit, open circuit? How to know whether the bulb is short circuit or open circuit? What about the series connection of voltmeter? What about the parallel connection of ammeter? It's junior high school science knowledge
- 9. In the series circuit, a bulb short circuit or open circuit, how does the voltmeter and ammeter change, and in the parallel circuit, how does the ammeter and the voltmeter change
- 10. The ammeter is out of order. There is a voltmeter. How to measure the rated power of the bulb
- 11. How to calculate the total power when the current and voltage of three-phase electricity are known/
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- 13. When two resistors are connected in parallel, please tell us the distribution law of their current and electric power
- 14. In the home circuit, what is the device that shows how much electricity is used?
- 15. Problems in the chapter of home circuit in Physics There is a voltage of 220 V between the live line and the zero line, not between the zero line and the ground, and not between the ground and the ground. Why? It is said in the book that the zero line is connected to the ground, and then the ground is grounded. I don't quite understand. Who can explain this voltage. But isn't the home circuit AC? Can't the current pass through the zero line? At this time, it has no voltage? And, Is it OK to touch the zero line when you get an electric shock? Does the zero line also have current? It's better to have a circuit diagram to explain If the zero line forms a loop with the live line, why does it have no voltage and current
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- 19. Physical home circuit problems In the evening, plug the desk lamp into the socket beside the desk. When the desk lamp switch is closed, the desk lamp doesn't light up. Plug the desk lamp into other teahouses, and find that the desk lamp can light up normally. Insert the pen into the socket hole beside the desk for inspection, and find that one of the holes can make the pen neon. What's the cause of the failure?
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