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::
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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