I am confused on the terms Open, Short, and Closed when talking about circuits.. As far as I know:

a) Open circuit means the wires are cut off so there will be no current will flow. But there is voltage.

b) Closed circuit means the wires are connected so there will be flow of current. But there is no voltage

c) Short circuit also mean like closed circuit.

Does my knowledge (a,b,c) about my question correct?

There is also another thing which confuses me:

d) Voltage is the force that makes the current flow. How can there be current but no voltage or voltage but no current? (from formula: V = I*R)

Please explain a, b, c and d so it won't bother me anymore if I am going to solve circuits..

In case of short circuit as well as closed circuit, the wires ARE

connected but the difference is that in case of short circuit, the

resistance between the connection is extremely low so very

high current flows as per ohm's law, whereas in case of close

circuit, the connection offers considerable resistance, hence no

high current issue.

For (a,b,c) that's more or less correct. In general, there doesn't have to

be a voltage/current just because there is a short/open, there just can't

be any voltage in a perfect short and there can't be any current in a

perfect open.

Another way to re-word these two terms is that a short circuit has 0

resistance (R=0), and an open circuit has infinite resistance

(R=infinity).

So in Ohm's law,

V = IR

If R = 0, then V = 0.

If R = infinity, then using some mathematical trickery:

I=limR→∞VR=0

As far as the force analogy goes, if it's useful think about you pushing

on a building. Just because you are applying a force doesn't mean the

building is going anywhere. These type of analogies tend to break

down when dealing with theoretical 0's and infinities, so I wouldn't rely

too heavily on them but rather look at the mathematics.