Capacitor values as written on small capacitors are sometimes misleading. Letters like p (pico) or n (nano) are used in place of the decimal point to identify its position and the value of the capacitor.
For example, a capacitor labelled as n33 = 0.33nF, 8n2 = 8.2nF, 22n = 47nF and so on. Sometimes capacitors are marked with the capital letter K to signify a value of Kilo pico-Farads. As for example, a capacitor with the markings of 100K would be 1000 `xx` 100 pF = 100 Kpf = 100 nF.
Sometimes, a three letter code consists of the two value digits and a multiplier. For example, the digits 471 = 47 `xx` 10 = 470 pF, 332 = 33 `xx` 100 = 3300 pf.
To reduce these confusions an International colour coding scheme was developed almost same as that of resistance colour code.

The value obtained from colour code is in pf.
Two capacitors marked as 221 and 220 respectively are joined in paralle. What is the total capacitance value?

Options

A. 441 pF
B. 242 pF
C. 242 nF
D. 441 nF

Answer

B

Explanation

The value of the capacitor marked as 221 is 220 pF. The value of the capactior marked as 220 is 22 pF. When connected in parallel, the total capacitance = 220 pF + 22 pF = 242 pF