Capacitive reactance is an opposition to the change of voltage across an element. Capacitive reactance X_{C} is inversely proportional to the signalfrequency f (or angular frequency ω) and the capacitance C. |

1,000,000 pF = 1000 nF = 1 µF = 1 × 10^{−6} F100,000 pF = 100 nF = 0.1 µF = 1 × 10 ^{−7} F10,000 pF = 10 nF = 0.01 µF = 1 × 10 ^{−8} F1,000 pF = 1 nF = 0.001 µF = 1 × 10^{−9} F100 pF = 0.1 nF = 0.0001 µF = 1 × 10 ^{−10} F10 pF = 0.01 nF = 0.00001 µF = 1 × 10 ^{−11} F1 pF = 0.001 nF = 0.000001 µF = 1 × 10^{−12} F |

SI multiples for hertz (Hz) | ||||||

Value |
Symbol |
Name |
||||

10^{3} Hz |
kHz | kilohertz | ||||

10^{6} Hz |
MHz | megahertz | ||||

10^{9} Hz |
GHz | gigahertz | ||||

10^{12} Hz |
THz | terahertz | ||||

Common prefixed units |

**Capacity of a capacitor (condenser)**

*C*=*Q*/*V***Capacity**

*C*, charge*Q*, and voltage*V*.
Please enter

**two**values, the third value will be calculated.
N.Kesav says

Hai sir….

I have some doubt in non polarised capacitor…

Many of the circuits capacitors unit mentioned in

Pico farad PF

Nano farad NF

Micro farad UF

1.What is the voltage range of this units..

If PF means 50v

NF means 100v

UF means 400v..

Is there any voltage rules for this three units..

2.Some of the circuit they not mentioning types of capacitors used…so in this case ,is there any common types non polarised capacitors..

3.How to check this capacitor working or not…

Pls give me clarification of this 3 doubts sir..

Swag says

Hi Kesav,

There’s no technical restrictions for the voltage rating.

50V is the standard value for all non-polar capacitors which are produced for DC circuits, because “50V” value suits and works with most DC operated circuits, therefore 50V is selected as the recommended value for disc capacitors below 1uF and other non-polar capacitors.

Moreover the cost of making a 50V non-polar capacitor and 25V non-polar capacitor will be almost the same, therefore 50V is selected as the best standard value.

Nevertheless higher voltage non-polar values can be acquired for equivalently higher prices, as per specifications.

However For electrolytic capacitors we have different voltage rating because the size and the manufacturing cost changes with voltage rating therefore the manufacture has to consider different ranges depending on size and cost.

You can study more in this article

https://www.homemade-circuits.com/how-to-identify-component-specs-in/