hi i got a circuit with a 100n capacitor can any one tell me what should be the number written on the ceramic capacitor ? i think it showld be 104 but i am not confirm. please tell me!

The markings on capacitors use a code that is almost the same as the code used for labeling resistors.

There are three numerals. The first two numerals represent a number between 00 and 99, the last numeral represents a power of 10. The only difference from the resistor color code is for capacitors the product is in picofarads (10^{-12} F)

Thus a capacitor with 104 printed on it, says:

10*10^4 picofarads = 10^{1}*10^{4} =10^{5} picofarads = 10^{5}*10^{-12} F = 10^{-7} F

There are three numerals. The first two numerals represent a number between 00 and 99, the last numeral represents a power of 10. The only difference from the resistor color code is for capacitors the product is in

picofarads(10^{-12}F)Thus a capacitor with

104printed on it, says:10*10^4picofarads = 10^{1}*10^{4}=10^{5}picofarads = 10^{5}*10^{-12}F = 10^{-7}F= 100 * 10

^{-9}F = 100 nF= 0.1 *10

^{-6}= 0.1 uFSee also

http://en.wikipedia.org/wiki/Capacitor#Capacitor_markings

10 ^ 4 x zero