At the high end of the household circuit, the voltage sometimes drops to 198v. What is the actual power of a "200v100w" bulb working at this voltage
It's a "220 V 100 W" bulb. The resistance of the bulb can be calculated as 484 Ω. The actual power = the square of the actual voltage △ resistance = 81 W
A 220 V / 100 W bulb with a rated current of___ A resistance is___ Ohm
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- 1. How much is the rated current of two 220 V 100 W bulbs connected in series in 220 V circuit?
- 2. There is a rated voltage of 220 V, power 100 W incandescent lamp, 5 hours a day, 30 days how much electricity?
- 3. After connecting two "220 V, 60 W" bulbs in series and connecting them at both ends of the 220 V circuit, what is the actual total power of the two lamps?
- 4. Bulbs L1 and L2 are respectively marked with the words "220V 25W" and "220V 15W". If the two bulbs are connected in series and connected in the home circuit, the voltage ratio of the two lamps is______ What is the ratio of the current passing through______ What is the ratio of the actual power consumed______ The brighter light is______ If they are connected in parallel in a home circuit, the voltage ratio of the two lamps is______ What is the ratio of the current passing through______ What is the ratio of the actual power consumed______ The brighter light is______ .
- 5. The rated voltage of a color lamp is 36V. It needs to be connected to the circuit of 220V. How many such bulbs are connected in series to work normally Why is 220 divided by 36 equal to 7? Isn't 36 multiplied by 7 more than 220 V
- 6. In festivals, we install colored lights. Now we have dozens of colored light bulbs on hand. When we work, the voltage at both ends is not more than 6.3V. We can only use the home circuit to supply power. The feasible way is () A. Connect 34 lights in series to the circuit B. connect 34 lights in parallel to the circuit C. connect 35 lights in series to the circuit D. connect 35 lights in parallel to the circuit
- 7. From the power supply with voltage of 220 V to an electric lamp marked "pz220-60" in a distant construction site, because the power supply wire has resistance The actual power consumed by the bulb is 55W. Then 1. The resistance of the filament? 2. The actual voltage at both ends of the bulb? 3. The electric power consumed by the wire?
- 8. Low voltage 24 V LED lamp connected to the protection of 220 V power supply will burn out
- 9. Connect two light bulbs marked with 220v100w and 220v60w in series to the 220 V power supply. What is their actual power,
- 10. Which lamp is brighter when it is connected to the 220 V power supply after it is connected in series with the 220 V 40W lamp A and the 220 V 100W lamp B
- 11. Two models of "220 V, 40 W" and "220 V, 60 W" incandescent lamps are connected in series in the home circuit, and their actual electric power is calculated
- 12. The rated voltage is 220 V, the rated power is 840 W, the frequency is 50 Hz, the capacity is 4 L, and the bottle weighs 2 kg. Xiaoming's family has an electric kettle. The chromium brand is as the table asks. Now he puts 3 L of 20 ℃ water in the kettle, asking: (1) what's the quality of the water in the kettle? (2) How many minutes does it take to boil the water at rated voltage? (assuming that there is no heat loss under 1 standard atmospheric pressure) (3) if the actual voltage of the electric kettle is 90% of the rated voltage during the peak period of power consumption, what is the actual electric power of the kettle?
- 13. Xiao Ming's family has an electric kettle. The name plate is shown in the picture on the right. He uses this electric kettle to boil water under the rated voltage and pass hot water Xiao Ming's family has an electric kettle. The name plate is shown in the right figure. Rated voltage: 220 v. rated power: 840 W. frequency: 50 Hz. Capacity: 4 L. how much current does he use this electric kettle to boil water at rated voltage? If all electric energy is converted into internal energy, how much electric energy does it consume to boil a kettle of water at 20 ℃ (one standard atmospheric pressure)? (excluding the heat absorbed by the kettle itself)
- 14. There are a series of parameters on the dial of Wangli home appliance energy meter, as follows: 220V 10 (20) a 50hz600revs / kW · h 2007 21 After working for 15 minutes, the turntable of the electric energy meter turns 150 times. How many kwh of electric energy is consumed? What is the power of the micro blog channel
- 15. A set of electric water heater is connected to the circuit of 220 V voltage and works normally. The resistance of the electric water heater is 55 ohm (1) How to transform the energy when the electric water heater works? (2) what is the power of the electric water heater?
- 16. When the microwave oven works normally, the magnetron emits electromagnetic wave with a frequency of 2450MHz. How many meters is the wavelength of the electromagnetic wave
- 17. The electric kettle marked with "220V, 2000W" works normally for 3min and consumes electric energy_____ kwh
- 18. Is induction cooker a pure resistance appliance? Can we say that part of the induction cooker is used for heat dissipation, because this part is very small, so it can be ignored? So it can be regarded as pure resistor?
- 19. What are the specifications of several large resistors in Midea induction cooker?
- 20. Will the capacitor be directly connected in series to the 220 V AC power supply circuit