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When the light bulb marked pz220-40 is connected to the circuit for normal lighting, does it consume more or less electric power than 40
If the voltage is higher than 220, the actual power will be greater than 40 watts. If the power grid is involved in the circuit during the peak period of power consumption, it will not be able to turn on 220 at this time, so it will not turn on 40 watts when the brightness is slightly dark
There is a bulb marked "pz220 40" in the circuit,
The rated voltage of this bulb is____ 5. It normally emits light for one minute and consumes electricity____ When it is connected to a circuit with a voltage of 110V, the actual power is____ .
There is a bulb marked with "pz220 40" in the circuit. The rated voltage of this bulb is (220) v. it consumes electric energy (2400j) for 1 min of normal lighting. When it is connected to the circuit with 110V voltage, the actual power is (10W)
Pz220-40 bulb connected to 110V circuit, the actual power is how much, connected to 440V circuit
No matter which voltage is connected, the resistance is certain. R = u ^ 2 / P = 48400 / 40 = 1210 Ω
When connected to 110V, P = u & # / r = 10W
When connected at 440V, P = u & # 178 / r = 160W, it is not allowed at this time, the lamp will emit strong light, and it will be burnt out instantly
A and B lamps marked with "pz220 40" and "pz220 60" are connected in series in the home circuit (with filament resistance unchanged). After the circuit is connected, the actual power of B lamp is equal to its rated power______ Times. (results retain two significant digits)
The resistance of a lamp R1 = u21p1 = (220V) 240W = 1210 Ω, the resistance of B lamp R2 = u22p2 = (220V) 260W ≈ 807 Ω, the circuit current after series connection I = ur1 + R2 = 220v1210 Ω + 807 Ω ≈ 0.1A, the actual power of B lamp P = i2r2 = (0.1A) 2 × 807 Ω = 8.07w, P real p value = 8.07w60w ≈ 0.13
RELATED INFORMATIONS
- 1. Connect the light bulb L1 marked pz220-40 and the light bulb L2 marked pa220-60 in series in the home circuit. After the circuit is connected, how many times of the rated power is the actual power of L1
- 2. The bulb "pz220-15" and the bulb "pz220-40" are connected in series to calculate the maximum current and maximum voltage in the circuit?
- 3. A bulb marked with "pz220-100" works normally for 100 hours. How many kilowatts does it use? How many hours can the bulb marked with "pz220-40" work normally with 1 kwh of electricity?
- 4. If the two lamps marked 22V 200W and 220V 40W are connected in series and connected into the 380V circuit, they will burn down, After calculating the resistance, the 40W bulb will not be used
- 5. When a household incandescent lamp works normally with a current of 0.2 a, how many joules does the current work on the lamp and how many joules does the current consume per minute
- 6. If an incandescent lamp works normally for 2 hours and consumes 0.108 * 10 ^ 6J of electric energy, how many J is the work done by the current and how many kwh is it
- 7. The current of an ordinary household incandescent lamp is close to () A. 0.18AB. 1.8AC. 3AD. 0.018A
- 8. When an ordinary household incandescent lamp lights normally, the current through it is about () A. 2 × 101 a B. 2 × 102 a C. 2 × 10-1 a D. 2 × 10-2 a
- 9. The circuit diagram of electronic lamp made of 50 3.2v16ma white LED lamps with 220 V power input
- 10. How much resistance should 20 3V LED lamps be connected in series in the 220V circuit?
- 11. There is an electrical appliance with a resistance of 121 ohm at 220 V and 400 W. if the voltage is 380 V, how small is the resistance to be equal to 400 W? Please explain the reason
- 12. There is an electrical appliance with a resistance of 10 ohm and a current of 0.6A to work normally. Now there is a power supply voltage of 9V, so it is necessary to connect this electrical appliance in series How much resistance can it work normally? Find the formula
- 13. The name plates of the two lamps are marked with "220 V, 100 W" and "220 V, 25 W" respectively“ When a lights up normally, the electric power of lamp a is four times that of lamp B When B lights up normally, class a consumes four times as much electricity as class B
- 14. There is a bulb marked with "220V 40W". In order to connect the lamp to the 382v circuit for normal use, what is the resistance in series? I know the answer, but how?
- 15. Pz220-100 filament resistor works normally for 10h and consumes electric energy 1. When the incandescent lamp marked with "pz220-100" works normally, the filament resistance is_____ Oh, working normally for 10 hours, what is the power consumption_____ KW·h. 2. An incandescent lamp is marked with "6V 3W". If you want to connect it to 9V power supply, in order to make it shine normally, you should connect one in series__________ If the current is applied for 10 seconds, the total work done by the current is____ J.
- 16. How many hours can a "220 V 40 W" light bulb shine normally with 1 kW / h electric energy? The electric energy meter of Xiao Han's family is marked with the word "PZ 220 V 5A". How many "220 V 60 W" light bulbs can shine normally at the same time with this electric energy meter It's a process. Thank you
- 17. A lamp consumes 1kW · h for 25h. What is the power of this lamp?
- 18. A 25h electric lamp consumes 1kW * h. what is the power of this lamp? What does 25h mean
- 19. &In the circuit shown in the figure, the fixed resistance R1 = 5 Ω, R2 is sliding rheostat, and the power supply voltage remains unchanged. When the slide P is at the a end, the current representation is 0.6A; when the slide P is at the B end, the voltage representation is 2V, then the power supply voltage is 0.6A______ The maximum resistance value of sliding rheostat R2 is______ ．
- 20. Resistance R1: R2 = 2:3, connected in parallel in the circuit, the current through R1 is 3a, what is the total current? If they are connected in series, what is the current in R1?