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usually, positive wires have a blue rubber coating, whereas negative wires have a red rubber coating.

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Q: How can you tell the difference between positive and negative wires?
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How do you tell the difference between positive and negative on a led?

The longer wire is the positive end, but if the wires are the same length, check inside the LED. There are two easily seen parts connected by a wire, the smaller is the positive.


Which unit describes the difference in conduction between the wires?

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It will measure the temperature difference between two points and convert it to voltage signal.


What is the direction of current flow in a Battery and why?

Current means flow. Electric current means flow of electric charges Now there are two kind of charges. They are positive and negative But current is defined as the flow of positive charges But in metallic wires there is no chance for positive charges to flow through. Only loosely bound electrons with negative charge are capable of flowing. So current is case of metallic wire is due to electrons. So we have to assign as "conventional current". Conventional current is always opposite to the flow of electron flow Now from a battery current (conventional) flows right from positive polarity to the negative polarity. But within batter is has to flow right from negative to positive so as to complete the circuit of flow.


What is The Voltage Of each wire in Straight 220V Circuit?

Voltage is not an absolute figure. Voltage Difference is the exact term. So, the voltage difference between the two wires in the 220 V circuit will be 220V.

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Does a 220 volt ac contact get a positive and a negative?

A 220 vac circuit has 2 hot wires and a neutral. The neutral stays at 0 volts and the hot wires vary between positive and negative. When one is positive, the other is negative.


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The longer wire is the positive end, but if the wires are the same length, check inside the LED. There are two easily seen parts connected by a wire, the smaller is the positive.


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