The
humble resistor is a basic building block of electrical circuits.
The resistor's function is to reduce the flow of electric current.
Resistance value is designated in units called the "Ohm". A 1000
Ohm resistor is typically shown as 1 kOhm (kilo Ohm), and 1000
kOhms is written as 1 MOhm (mega ohm).
Because resistors are too
small to print numerical resistance values on, they are instead
marked with four, five, or (less commonly) six coloured bands. Each
colour represents a different number and so the value in Ohms of
the resistor can easily be determined.
When
resistors are connected in series or in parallel, an equivalent
resistance can be calculated.
To
solve this puzzle simply calculate the equivalent resistance value
of each set up. The equivalent resistance (in kiloOhms) between A
and B is the North minutes, and the equivalent resistance between C
and D is the West minutes.
There is no band shown for tolerance (accuracy).
There is $1.25 in the cache for the FTF for a pop or
chocolate bar
There are
1000's of internet resources to help figure out the value, or ask a
grade 9 physics student.