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...
the power rating is one of the specifications of a resistor, and sometimes, it is also called the resistor wattage rating. Joule’s first law states that the electrical power which is generated is the product of the voltage across the resistor & the flow...
Theinductorstores electrical energy in the form of magnetic energy and the capacitor stores electrical energy in the form of electrostatic energy. Neither of them dissipates it. Further, there is a phase shift between voltage and current. In circuits withresistor, inductors, and capacitors, a phas...
To calculate the power rating of a resistor, the formula used to calculate the power can be used which is given below: Here ‘V’ denotes voltage across the resistor while ‘I’ denotes current through it. Using Ohms’ law: Substituting in the above formula, we get two expressions: Measure...
When a stroke hits the shield wire or the tower of high-voltage overhead power lines, flashover may occur either along the span or across tower insulators, depending on the relevant voltages and insulation strength. As a result, backflashover may take place from the tower structure to the ...
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: ...
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...
7.7). To perform the dynamic stability analysis, load perturbation will be realized by changing the value of resistor and inductor. Differential equations for the load can be expressed in Eq. (7.16). Sign in to download full-size image Figure 7.7. Load model. (7.16)d(iLoD)dt=1LLo(−R...
Line regulationis the ability of a power supply to maintain the output voltage given changes in the input line voltage. Load regulationis the ability of a power supply output to remain constant given changes in the load. You shouldexercise caution when sourcing power to capacitive, inductive, an...
Even if the formula for DC heat dissipation in a resistor isn't at your fingertips, a little Ohm's Law and the definition of power can easily create it. On the other hand, forgetting to calculate power ratings, particularly for cathode resistors and RC ripple filters, is one of the most...