The voltage at both ends of the small bulb is 3.8V, and the current passing through is 0.3A. Within 10min, the current does work on -- J and consumes -- J's electric energy To get the formula, the process

Power: P = UI = 3.8 * 0.3 = 1.14w
W=P*t=1.14*10*60=684J
Current work = consumed energy = 684j

If the voltage at both ends of a bulb is 220 V and the maximum energy consumed within 10 min is 2.4 * 10000 J, what is the power? Current? Resistance?

P=W/t=24000/(10*60)=40W
I=P/U=40W/220V=0.18A
R = u ^ 2 / P = 220 * 220 / 40 = 1210 Ω (or r = u / I = 220 / 0.18 = 1222 Ω, the difference is because the current of the latter is about equal to, so there is error)

RELATED INFORMATIONS

1. If the light bulb is short circuited, does the voltmeter and ammeter show the number?
2. 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
3. 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
4. The ammeter is out of order. There is a voltmeter. How to measure the rated power of the bulb
5. When measuring the electric power of small bulb, considering that the ammeter and voltmeter have certain resistance, should the measured value of electric power of small bulb be larger than the real value
6. Xiaohong and Xiaowei have done the experiment of "measuring the electric power of small light bulb". There are two kinds of power supply (voltage is 6V), voltmeter, ammeter and sliding rheostat (a is marked with "50 Ω & nbsp; & nbsp; 2A", B is marked with "20 Ω & nbsp; & nbsp; It is known that the rated voltage of the two small lamps are 2.5 V and 3.5 V respectively, and the rated current is the same. They choose the equipment to carry out the experiment. Xiaohong connects the circuit correctly, connects a small lamp into the circuit, closes the key, moves the slide of the rheostat, and observes that the small lamp lights normally when the slide is near the midpoint. The ammeter shows the following As shown in the figure. ① during the experiment, the rheostat selected by Xiao Hong is______ (choose "a" or "B"), the rated voltage of the lamp she measured is______ V, rated current of______ Please calculate the rated power of Xiaohong and Xiaowei according to the relevant information______ (write the calculation process)
7. There is a small bulb of ammeter and voltmeter in series circuit Among them, the voltmeter measures the normal light of the small bulb The position of ammeter bulb is changed Write down what's going to happen next
8. The three voltages of one equipment are 380V, the load current of the main switch is 160A, the rated capacity of the equipment is 65kva, and the power factor is about 0.95 The three voltage of a device is 380V, the main switch of load current is 160A, the rated capacity of the device is 65kva, and the power factor is about 0.95, Can this 160A be used as the total current?
9. How many times of the line current of squirrel cage three-phase asynchronous motor when it is star connected is that when it is triangle connected?
10. The purpose of star delta Depressurization So the line current is a fixed value. The star phase current is equal to the line current, which is the value. The △ phase current is one third of this value. So the △ phase current is smaller
11. How much resistance does it take to connect 1 LED (light emitting diode) in series with 24 V voltage
12. 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,
13. 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?
14. 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
15. 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
16. 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?
17. How to calculate the total power when the current and voltage of three-phase electricity are known/
18. Current calculation of three phase electricity According to the formula P = 1.73ui Then the three-phase current is 98.110.105 respectively. How to calculate the power In addition, there is a 400v30kw51.4a generator. Does 51.4a mean that each phase can carry 51.4a current
19. When two resistors are connected in parallel, please tell us the distribution law of their current and electric power
20. In the home circuit, what is the device that shows how much electricity is used?