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Why is the current work formula w = IUT and how is the formula derived
High school students? Just remember this formula
Calculus is used in college physics
Electric energy formula voltage square times time divided by resistance and current square times resistance times time
Electric energy formula = voltage * current * time = power * time = kWh
RELATED INFORMATIONS
- 1. The voltage at both ends of the resistor increases to twice of the original value, and the work done by the current is several times of the original value in the same power on time
- 2. Power loss of overhead transmission lines P = voltage squared / resistance P = current squared * resistance why in overhead transmission lines, power loss is often reduced by increasing voltage and reducing current, rather than by increasing current and reducing voltage?
- 3. In a three-phase asynchronous motor, how to calculate the rotational speed of the rotor's rotating magnetic field and whether it is the same as that of the rotor?
- 4. The rated power of three-phase asynchronous motor refers to
- 5. What is the definition of electric power
- 6. Xiao Li's family has a 220V 2000W water heater. The water heater works normally. How many joules does it consume in 5h
- 7. The rated power of an electric fan is 60W, the internal resistance is 2 Ω, and the rated voltage is 220. If it is connected to the power supply, it can't rotate for some reason. Calculate the current and actual electric power
- 8. Two resistors R1 and R2 are connected to the circuit in parallel, and the total resistance is 3 ohm, in which R1 = 4 ohm? A. 1 ohm B.7 ohm c.12 ohm D11 / 2
- 9. In the circuit as shown in the figure, the power supply voltage remains unchanged, and the resistance R2 = 2r1. Suppose that the electric power of resistance R2 is P1 when switch S2 is closed and S1 is open, and the electric power of resistance R2 is P2 when both switches S1 and S2 are closed, then the electric power P1: P2=______ At this time, the electric power of resistance R1 is equal to______ Tile
- 10. Two resistors, R1 = 12 Ω, R2 = 24 Ω, are connected in series to a 48V power supply. How much power is consumed by R1? (2) How much heat does R1 and R2 produce per minute?
- 11. Is the hysteresis in power factor λ = 0.866 (hysteresis) current hysteresis voltage or voltage hysteresis current? Symmetrical three phase motor
- 12. A third day physics power problem! If an electric kettle is marked with the word "220 V 800 W", how much power is consumed when it works normally for 20 minutes? What is the rated current? What is the resistance when it works normally? (for detailed process, speed ~~~~~~~~~~~
- 13. Which units are the units of electric power and which are the units of electric energy?
- 14. In terms of physical parameters, should the brightness of the two bulbs be compared by current, voltage or electric power?
- 15. In parallel circuit (when the voltage is equal), if the power of one bulb is higher than the other, is it brighter than the other There are series circuit, by the way, there are no other factors will affect, also said. Tomorrow on the entrance examination on physics
- 16. Two lights L1 and L2 are connected in series in the circuit. Is the power of light or dark high? Is it in parallel?
- 17. Characteristics of electric power in series and parallel circuits
- 18. If the ratio of power to resistance is 1:9 and the ratio of resistance is 1:4, then the ratio of current passing through them is?
- 19. There are two resistors, a and B, which are connected in series to a certain circuit. It is measured that the ratio of electric power consumed by them is 3:2. If they are connected in parallel to the same circuit The ratio of electric power consumed by them is as follows:
- 20. Why is the resistance and power of electric furnace high in parallel circuit?