Week 1 day 1

Solderless Breadboard, Open Circuits and Short Circuits. 

Part 1 

Using an ohmmeter we measure the resistance between two holes in the same row.

We measured the resistance of the breadboard to be 2.5 Ohm (closed circuit).

Part 2

Using the same method we measure the resistance between two rows of holes on opposite sides of the breadboard

We measured the resistance of the breadboard to be infinite (it's an open circuit).

Part 3

We check the resistance between two holes that are not in the same row but on different side

The resistance measured between the two holes is found to be infinite (open circuit)

Part 4

using the same two holes, we connected the two sides using another jumper wire 

we measured the resistance to be 4.1 Ohm (closed circuit)

Summary
In Breadboard circuit, holes in the same row and sides have zero resistance and acted as a short circuit. holes in the same side but different row have infinite resistance and acted as an open circuit.
Holes in the same row but different sides also have infinite resistance and acted as an open circuit.