The power dissipated in a resistor can be calculated using the formula ___. A. P = I²R B. P = V²/R C. P = VI D. All of the above 相关知识点: 试题来源: 解析 D。解析:电阻消耗的功率可以用 P = I²R、P = V²/R、P = VI 三个公式计算。反馈...
无功和有功功率(Reactivepowerandreactivepower) Activepowerandreactivepower 1.Activepower: Inaccircuit,thepowerconsumedbytheresistanceiscalled activepower,andPisexpressedinletterP. Singlephaseactivepower:P=UIcosphi Informula:P-power,foractivepower(W); U-phasevoltage(v); I-phasecurrent(Ann); Cosineofph...
Real power is given by P = VIcosφ. The electrical current is inversely proportional to cosφ for transferring a given amount of power at a certainvoltage. Hence higher the pf lower will be the current flowing. A small current flow requires a less cross-sectional area of conductors, and t...
the rest of the circuit is not shown here in the figure. The polarity of thevoltage dropacross the resistor and the direction of current through the resistor are shown in the figure below. The resistor is consuming a power of vi watts as current i ampere enters in the resistor though its...
The power factor for the circuit, overall, has been substantially improved. The main current has been decreased from 1.41 amps to 994.7 milliamps, while the power dissipated at the load resistor remains unchanged at 119.365 watts. The power factor is much closer to being 1: ...
I need to determine the voltage across each globe, the current through each globe, the power consumed by each globe and finally, if we had a power board with a circuit breaker rated to flip at 10A, how many sets of lights could I operate before flipping the circuit breaker?...
Electric power is defined as the rate at which electrical work is done or the rate at which electrical energy is consumed. The power extended in heating a resistor depends upon the potential difference between the terminals and the electric current passing through it. ...
Reverse currents can cause your power supply to move into an unregulated mode and may cause damage. Avoid reverse currents by using a bleed-off load to preload the output of the device. Output voltage and current can be increased by cascading the outputs of a multichannel power supply or mult...
In order to ensure a linear response from the current amplifier, its input is required to be similar, which means the potential difference generated across R(shunt) needs to be similar to the voltage generated around Rcp, because we cannot have a DC through the nono-inverting resistor input ...
The non-ideal MOSFET and the inductor have an internal series resistor and an increase in the current passing through these components increases the power loss exponentially which reduces the efficiency of the converter, as shown in Eq. (8). The current passing through the diodes, MOSFETs, and...