功率（p）与电流（i）和电阻（r）的关系： 根据功率公式 p = i^2 * r 或 p = v^2 / r，功率与电流的平方成正比，与电阻成反比。 这些公式可以用于计算电流、电压、电阻和功率之间的关系以 …

For the circuit shown below, use Ohms law to find the Voltage (V), the Current (I), the Resistance (R) and the Power (P) around the circuit. Voltage [ V = I x R ] = 2 x 12Ω = 24V Current [ I = V ÷ …

The power formula can be rewritten using Ohm’s law as P =I 2 R or P = V 2 /R, where V is the potential difference, I is the electric current, R is the resistance, and P is the electric power.

2016年6月18日 · In order to calculate power loss in the transmission lines, you need to know the power received by the load end and the voltage at the load end. Use these two to calculate the …

Electric power (P P) is simply the product of current times voltage. Power has familiar units of watts. Since the SI unit for potential energy (PE) is the joule, power has units of joules per …

p = v 2 / r. p是以瓦特（w）為單位的功率。 v是以伏特（v）為單位的電壓。 i是電流，單位為安培（a）。 r是電阻，單位為歐姆（Ω）。 交流電路的功率. 該公式適用於單相交流電源。 對於三 …

$P=IV$ is always correct. $P=V^2/R$ is correct for an ohmic device, or a device that obeys Ohms law. Ohm's law states that $V=IR$ Typically problems will involve either a constant resistance …

2024年9月12日 · P = V × (V/R) = V 2 /R. P = (I×R) × I = I 2 R. Depending on the available quantities, you can use one of the three power formulas for calculating DC Power. Power …

2016年2月14日 · In the equation P =V2/R P = V 2 / R all of the values are for a single element. In other words, V V is the voltage dropped across the bulb, R R is the resistance of the bulb, and …

2 正弦电压的峰峰幅度 = rms值 × 2√2。对于正弦电压，V p-p = V rms × 2√2，其中V p-p表示峰峰电压，V rms表示rms电压。这是大家熟知的关系式，许多教科书中都有提供，在以下站点中 …