Electronics - Voltage and Current - Discussion

From Ohm's law,

Current(I) = Voltage(V)/Resistance(R).

Current flows only when circuit is closed.

See. You cannot have a current flow in open air.

That's why the birds don't get shocks while touching only one wire.

Instead if the bird is a BAT and touches two wire due to which the current gets one more path to travel except itself i.e. through the BAT's body. And poor bat dies. !

Same phenomenon is applied here. If a circuit is open then current cannot flow through it as the flow of electrons will not get any path for their conduction. Until and unless it is connected with a wire or some other conducting material connected with the opposite terminal of the battery.

Current flows only when circuit is closed.

According to ohms law V=IR, V is directly proportional to I, and R is proportionality constant, here it means voltage influence current. This whole process is occurred when only the circuit is closed (according to ohms law).

The current is due to the potential difference at the two points of the closed circuit.

As per ohms law voltage is directly proportional to current, there is no current in open circuit hence there is no effect of voltage in open circuit. There is effect of voltage in closed because current exists in closed circuit.

As per ohms low, V==IR, current flow in the Closed circuit, when circuit is open their is no any current to flow.

In open circuit ohms law not applicable. Its is apply on close loop circuit or mesh.

Current will flow only when the circuit is closed.

If open circuit = no current flow.

If insulated = current not effected.

If high resistance = it oppose the current.

If circuit is closed = it allows the current flow.