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Current requires a medium to flow through, gas, liquid or solids. In metals, free electrons allow passing of current from one region to another. In non-metals, they would have to be molten for the molecules to pass the current around since the molecules in a solid can only vibrate. In gases, the molecules are free to move about, allowing current to be conducted (I suppose).
What else can I help you with?
What condition is necessary fpr a sustained flow of electric charge through a conducting medium?
A potential difference, or voltage, is necessary for a sustained flow of electric charge through a conducting medium. This potential difference creates an electric field that pushes the charges through the conductor. Without a potential difference, the charges will not move and no current will flow.
Is a conductor necessary for electricity to flow?
Yes, a conductor is necessary for electricity to flow. Conductors are materials that allow the flow of electric current, while insulators do not allow the flow of electric current.
A flow of electrical charges is known as an?
A flow of electrical charges running through a medium is known as an electrical current.
Why potential difference is necessary for the flow of current?
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What condition are necessary for a current to be present in a circuit?
The only two things needed for current flow are electromotive force or voltage and a conductor. The amount of current flow will depend on the "Resistance" in the circuit.
What Current is the flow of an electric charge.true or false?
True. Electric current is the flow of electric charge through a medium. It is typically measured in amperes (A) and represents the rate of flow of electric charge.
What condition is necessary for a sustained flow electric charge through a conducting medium?
A potential difference (voltage) across the conducting medium is necessary for a sustained flow of electric charge. This potential difference creates an electric field that pushes the charges through the conductor. Without a potential difference, there would be no force to maintain the flow of charges.
Why can't an electric current exist if the circuit is broken?
If the electric circuit is broken, there will be no medium for transfer of electrons and flow of current. Hence, electric current does not exist.
What is necessary in order to push current through a conductor?
A difference of potential (which is measured in Volts) is needed to make current flow.
Which term refers to the flow of electrical charges?
A flow of electrical charges is the definition of an electric current. This is a far better definition than 'a flow of free electrons', which one normally hears, because a current can be a flow of free electrons, positive or negative ions, 'holes', etc. -depending on the medium through which the current is flowing.
Will the current flow in a circuit in which there is a gap between two wires?
No, the current will not flow in a circuit with a gap between two wires, as a complete circuit is necessary for current to flow. The gap creates an open circuit, preventing electrons from moving through the circuit. Current requires a continuous path to travel, and without that connection, there is no flow.
Why the medium conductivity is low at high frequency?
skin effect. current flow concentrates near surfaces and avoids the bulk.
