Electronics - Voltage and Current - Discussion

The electrons flow in open circuit zero(no current) the electrons flow closed path is necessary.

Electrons only flow in an instance where there is continuity, therefore in a closed circuit, there is flow of electrons.

An open circuit leads to zero current whatever be the voltage so not A,

An insulated circuit will lead to a flow of negligible current however large the voltage be, so not B,

A high change in voltage is required to influence a small current in high resistance, so C is not viable.

Thus the closed circuit in which current flows on providing a potential difference and has no restrictions of insulation or high resistance is the most viable option.

Current is flow of electrons and its direction is against current. Electrons flow only in closed circuits so current only will be in closed circuits.

When the circuit is open, there is no path for flow of current. If the circuit is in short condition then there is o voltage. Voltage and current both are present when a circuit is in closed condition. So closed condition is the right answer.

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).

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.