Because the current must always travel in a complete loop, going through the circuit and returning to the supply. A current can't travel along only one wire so no power would get to the circuit unless it has two wires.
The ability of an object to transfer electric current is determined by its electrical conductivity. Materials with high electrical conductivity, such as metals, allow electric current to flow easily through them, while insulating materials have low electrical conductivity and inhibit the flow of current. Conductors like copper and silver are widely used for their high electrical conductivity.
Yes, alcohol is a liquid and has delocalised electrons which can carry the electrical current. Edited: Seriously? Unless there are impurities in the alcohol that are electrolytes, alcohol will NOT conduct an electric current. Alcohols are considered as NON ELECTROLYTES, as they do not ionize and thus will not conduct a current. (Dr.J.)
Electric current can flow through conductive materials such as metals (copper, silver, aluminum), electrolytes (saltwater, acids), and certain semiconductors (silicon, germanium). Insulating materials, like rubber and plastic, do not allow electric current to flow.
No, a rubber tubing is an insulator and will not allow the flow of electric current like a conductor such as copper wire would. Therefore, if the copper wire is replaced by rubber tubing, the circuit will be broken and no current will flow.
The unit of electric resistance is the ohm, represented by the symbol Ω. It measures the opposition that a material has to the flow of electric current through it. Smaller resistances allow for a larger current flow, while larger resistances restrict the current flow.
A single route for electrical current is called a branch circuit.
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.
an insulator
Materials that allow electric current to move through them are called conductors. Common examples include metals such as copper, silver, and aluminum. Conductors have low resistance to the flow of electric current due to their ability to easily transfer electrons.
Electric current flows in conducting materials such as metals. The best conductor of electric current is silver, followed closely by copper and then aluminium.
No, a resistor is not considered a conductor. Resistors are components that impede the flow of electric current, while conductors allow electric current to flow easily.
Switches either allow the current to flow or turn it off
Incorrect. Any material that allow electric current to pass through it is a conductor.
A Single bone would not allow flexibility.
No. A resister is not a replacement component for a diode. A resister is passive and allows current to flow through in in both directions. A diode is a single semiconductor junction that only allow current to flow in one direction.
Some materials that do not allow a current to pass through them include rubber, glass, and plastic. These materials are classified as insulators because they have high resistance to the flow of electric current.
Conductors, such as metals.