![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Is the hysteresis in power factor λ = 0.866 (hysteresis) current hysteresis voltage or voltage hysteresis current? Symmetrical three phase motor
What we call power factor hysteresis is current hysteresis voltage
Is the ratio of electric energy equal to the ratio of resistance equal to the ratio of electric power when the current of parallel branch is the same?
In a series circuit, the ratio of electric energy to resistance is equal to the ratio of electric power
Then, if the parallel branch current is the same, then, is the ratio of electric energy equal to the ratio of resistance equal to the ratio of electric power?
(but it seems that in parallel circuit, W1 / W2 = P1 / P2 = R2 / R1, under what circumstances is it
In a parallel circuit, the ratio of electric energy to electric power is equal to the inverse ratio of resistance
Note that this is an inverse ratio, that is, W1 / W2 = P1 / P2 = R2 / R1
------------------------
It's always like this!
------------------------
If the current is the same, R2 = R1. In this case,
W1/W2 = P1/P2 = R2/R1 = R1/R2 = 1
In this case, you are right to say that the ratio of electric energy equals the ratio of resistance equals the ratio of electric power
What is the amount of electricity passing through the cross section of a conductor in unit time? A voltage B current intensity C resistance D electric work
The current is the quantity of electricity passing through the cross section of conductor per unit time, i.e. I = q / T
B current intensity
What is the work done by electric field force? What is the specific formula?
The work done by the electric field force is that the charge is affected by the electric field force in the electric field. If it wants to move, under the action of the force, when displacement occurs, it will work. Because it is the electric field force, it is called the work done by the electric field force. The specific formula is as follows: the electric field force F = EQ, the work done by the electric field force w = f * s * cos α, α is the angle between the electric field force and displacement
RELATED INFORMATIONS
- 1. Why is the current work formula w = IUT and how is the formula derived
- 2. 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
- 3. 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?
- 4. 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?
- 5. The rated power of three-phase asynchronous motor refers to
- 6. What is the definition of electric power
- 7. Xiao Li's family has a 220V 2000W water heater. The water heater works normally. How many joules does it consume in 5h
- 8. 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
- 9. 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
- 10. 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
- 11. 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 ~~~~~~~~~~~
- 12. Which units are the units of electric power and which are the units of electric energy?
- 13. In terms of physical parameters, should the brightness of the two bulbs be compared by current, voltage or electric power?
- 14. 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
- 15. Two lights L1 and L2 are connected in series in the circuit. Is the power of light or dark high? Is it in parallel?
- 16. Characteristics of electric power in series and parallel circuits
- 17. 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?
- 18. 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:
- 19. Why is the resistance and power of electric furnace high in parallel circuit?
- 20. A constant value resistor and a sliding rheostat are connected in series in the circuit. When the sliding rheostat increases, how does the voltage of the constant value resistor change