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Why are two wires used to allow electric current to flow instead of a single one?
Wiki User
∙ 10y ago
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.
Wiki User
∙ 10y ago
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An ammeter and voltage range are measure the current and voltage electric lamp if mistake meter interchange what will happen?
1. Voltmeter has high impedance and hence will restrict the current severely.a) Electric Bulb will not glowb) The Ammeter will just measure the current that Voltmeter allows and since this current is much smaller than actual current nothing will happen to ammeter.c) The Voltmeter will measure the Voltage that is being applied.d) This will allow you to measure the resistance of the Voltmeter.VR=V/I
Why is a copper wire not used to make filaments of electric bulbs?
Because the filament is in effect a resistor. Copper is too good a conductor to provide resistance to the current, and would simply allow the current to complete the circuit. The light is generated by the filament glowing as it heats up in resistance to the current. Tungsten is a much better resistor.
Why should you not touch electric appliances with your wet hands?
If there is a small mA current leak in the appliance your wet hands increase your conductivity to the appliance up to a point where you might feel an electric shock. Dry hands have a high resistivity, whereas wet hands do not, the resistance is much lower.
How the structure of aluminium affect its properties?
well because of the free electrons in the structure of aluminium it is able to allow the passage of electron from electric current due to disassociated electrons in its structure basically because of the metallic bonding and the free electrons present it can conduct electricity and heat.
How is an electric current controlled?
Depends on what kind of current it is. Direct Current (D.C) runs in a straight line and can be simply controlled with a switch, it also takes the shortest route. Alternating Current (A.C) moves back and forth until it is converted and can be controlled using a National gid panel (or similer) and transformers.
Contrast insulators and conductors?
Insulators do not allow electric current to flow through. Conductors allow electric current to flow through.
What is a liquid or solid substance or mixture that does not allow an electric current?
an insulator
What material allows electric current to pass through?
Electric current flows in conducting materials such as metals. The best conductor of electric current is silver, followed closely by copper and then aluminium.
What Allows electric current to flow though them to devises and components?
Switches either allow the current to flow or turn it off
Is this sentence incorrect any material that allows an electric current to pass through is called a battery?
Incorrect. Any material that allow electric current to pass through it is a conductor.
Can a resistance be used in the circuit instead of diode?
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.
What is the reason for a vertebral column to be a collection of bones instead of a single bone?
A Single bone would not allow flexibility.
Which type of materials allow the charges of an electric current to move freely through them?
Conductors, such as metals.
What is the purpose is of a diode?
The purpose of a diode is to allow electric current to pass in one direction while blocking electric current in the opposite direction. It is for this reason that diode is usually referred as the check valve.
Why do ionic bonds allow for good conductivity?
Electric current is moving charges. Solid ionic compounds do not conduct electric current because the charged ions are locked into place. But if you dissolve an ionic compound in water or melt it, it can conduct electric current. This is because the ions are then free to move.
Will a thicker or thinner copper wire of the same length allow more electric current to pass through?
A thicker wire will transmit more current
When capacitor is having an insulation how is it allowing ac current?
Capacitor does not allow any current through it.By the changing of electric field across the plates it is usually assumed that capacitor allow ac through it.Is it???
