BASIC 
ELECTRONICS COURSE 
Page 5 INDEX

RESISTORS IN SERIES 

Any number of resistors can be placed in SERIES and their combined value is the ADDITION of the individual values. There are a number of reasons why two or more resistors are placed in series:
1. To obtain a "Special" value - one that is not a standard value
2. To create a higher wattage resistor.
3. To create a resistor that will withstand a higher voltage 
4. To "trim" a resistor 
5. To create an accurate value

Normally two resistors in series will be able to do this and our notes cover 
 2 RESISTORS IN SERIES:

Use this calculator to work out the following problems:: 

R A  + R B

= RTOTAL   ohms
      


PROBLEMS:
Use the calculator above  to determine the answers to the following: 

STANDARD FORM
The value of a resistor is presented in a STANDARD way. For values up to 1,000 ohms, the letter R (R for resistance) is placed after the value of resistance. For values 1,000 ohms to 999,999 ohms the letter "k" is used.  (k for kilo). For values above 1,000,000 the letter M is used. (M for Mega)
If the value is 8.2 ohms the value can be written 8.2R
If the value is 1,500 ohms, the answer can be written 1.5k  
If the value is 2,200,000 ohms the value can be written 2.2M
But the decimal point can be lost in a printing or photocopying process so the letters "R, "k" and "M" are inserted in place of the decimal point: For example: 
8R2,   1k5,    2M2

When using the calculator above you must change the value from Standard Form to pure numbers e.g:   8R2   becomes:      8.2     
         1k5   becomes:    1500     
         2M2  becomes:     2200000

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