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...
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Calculate the power dissipated in the 2-ohm resistor, if the voltage of the battery is \varepsilon = 15.2 V and the resistance of the resistor R is 7.6 ohms What is the power dissipated (in watts) in the 2R-resistor when E = 12.0 V and R ...
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: ...
If not, this energy is dissipated on-board by means of rheostats. Sending the energy back to the supply system causes an increase of the voltage at the pantograph. If the voltage increases beyond a predefined limit, the braking chopper modulates the DC voltage across the resistor to dissipate...
Hence the entire circuit behaves as a resistive circuit and the entire electrical power is dissipated in the form of heat. Here thevoltageand current are in the same phase and the total electrical power is given by: Now coming to the AC circuit, here both inductor and capacitor offer a cer...
By performing some simple algebra it is possible to discover the very useful formulae: W=V2RW=V2R . . and . . W=I2RW=I2R Using these formulae it is simple to work out the power dissipated in the 62.5 ohm resistor when a voltage of 250 volts is placed across it ...
They are of particular importance in determining the power dissipated by the rectifier under given working conditions. Sign in to download full-size image Fig. 1. Instantaneous forward voltage–current characteristic for a typical 100-ampere diode operated at 100°C junction temperature. The ideal ...
Gain is an important concept in electronics because it allows us to control the amount of voltage or current that flows through a circuit. By controlling the gain, we can control the amount of power that is dissipated in a circuit, and this can be used to regulate the heat dissipation of...
I have problems understanding the maximum ripple current of an electrolytic capacitor. I thought the max ripple current is linked to the thermal destruction of the capacitor, cause the dissipated power is R*I² where R is the ESR of the capacitor. ...