## What is J in capacitor?

j is the imaginary number, used in this case to sort out reactance and impedance from pure resistance. This is because the reactance of a capacitor is a leading reactance. That means that the current leads the voltage across it by 90 degrees.

### What size capacitor do I need?

A: The rule of thumb is to put in 1 Farad of capacitance for every 1,000 watts RMS of total system power. But there is no electronic penalty for using larger value caps, and in fact, many see benefits with 2 or 3 Farads per 1,000 watts RMS. The larger the cap, the more charge is available for the amp when it needs it.

**What is a 103 capacitor?**

Capacitors will have a number on them like 103, 104, 224 . The last number represents the number of zeroes. All values are in picofarads. For example: 103 becomes 10 + 000 (3 zeroes) pF = 10000 pF = 10 nF.

**How do you calculate J impedance?**

Impedance is the opposition of a circuit to alternating current. It’s measured in ohms….This is the only way to calculate the total impedance of a circuit in parallel that includes both resistance and reactance.

- Z = R + jX, where j is the imaginary component: √(-1).
- You cannot combine the two numbers.

## What size capacitor do I need for a 5000 watt amp?

50-Farad

Multi-Amp and Competition Systems | |
---|---|

700-watt to 2000-watt system | 25-Farad competition cap* |

1500-watt to 4000-watt system | 40-Farad competition cap* |

2000-watt to 5000-watt system | 50-Farad competition cap* |

3000-watt to 8000-watt system | 100-Farad competition cap* |

### How do I choose a capacitor?

For such circuits, careful selection of capacitors should be made considering their dissipation factor (typical loss of energy in percentage), dielectric absorption, leakage current or insulation resistance, and self-inductance. All these losses must be minimized to improve efficiency and battery life of the circuit.

**What is 2.2k capacitor?**

So, a 2.2k cap would be 2200 pF, or 2.2 nF, or . 0022 uF. Chances are that is the reading. Picofarads were the smallest common unit of measure of capacitance, so values were referenced from them.

**What value is a 103 ceramic capacitor?**

10,000 pF

For example, if the marking is 101P, the actual capacitance is no less than 100 pF but may be as much as 200 pF….Beta Program.

Marking | Capacitance (pF) | Capacitance (ìF) |
---|---|---|

102 | 1,000 pF | 0.001 ìF |

222 | 2,200 pF | 0.0022 ìF |

472 | 4,700 pF | 0.0047 ìF |

103 | 10,000 pF | 0.01 ìF |

## What does nF mean on a capacitor?

Values of capacitors are usually specified in farads (F), microfarads (μF), nanofarads (nF) and picofarads (pF). The millifarad is rarely used in practice (a capacitance of 4.7 mF (0.0047 F), for example, is instead written as 4700 μF, while the nanofarad is uncommon in North America.