Which has more resistivity a thick or thin wire of same material?
Resistivity depends on the nature of the substance and temperature. It does not depend on the dimensions, so resistivity of both is same. However the resistance of the thin wire will be more than that of the thick wire.
Does the thickness of a wire matter?
Unfortunately, size does matter. The most basic explanation on why wire gauge matters is because the thinner a wire is (higher gauge) the more resistance there will be to the flow of current. More resistance means more energy loss, which means weaker/less reliable detections.
Why are thick wires used over thin wires?
A piece of thin wire has higher resistance than a piece of thicker wire with the same length, which means that it’s harder for electric current to move through it. Using a longer wire will also increase resistance.
What is the effect of changing the wire in a circuit from a straight thick wire to a straight thin wire?
16 Cards in this Set
| In a simple series circuit, why does the bulb light when you close the switch? | Because closing the switch completes the circuit. |
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| What is the effect of changing the wire in a circuit from a straight thick wire to a straight thin wire? | The bulbs become dimmer. |
What do long straight lines represent in a circuit diagram?
the long line is representative for the positive terminal of the energy force and the short line require phone the negative terminal the straight line is used to represent a connecting wire between any two component of the circuit .
Which material does not permit the flow of electric current?
Materials which do not allow electric current to flow through them is known as. Materials which do not allow an electric current to flow through them are known as insulators. Materials such as glass, rubber, wood, plastics are examples of insulators.
How can we identify if a material is a good conductor of heat and electricity?
Answer: Materials that are good conductors of heat and of electricity must have free electrons that can carry the energy from one compound to the next.
Which is the bad conductor of electricity?
Materials like glass and plastic are poor electrical conductors, and are called insulators. They are used to stop electricity from flowing where it is not needed or where it can be dangerous, such as through our bodies.
Can I break a diamond with a hammer?
As an example, you can scratch steel with a diamond, but you can easily shatter a diamond with a hammer. The diamond is hard, the hammer is strong. This makes the diamond incredibly hard and is why it is able to scratch any other material.
Why is graphite a good conductor of electricity and diamond is not?
Graphite can conduct electricity because of the delocalised (free) electrons in its structure. These arise because each carbon atom is only bonded to 3 other carbon atoms. However, in diamond, all 4 outer electrons on each carbon atom are used in covalent bonding, so there are no delocalised electrons.
Why graphite is soft and conduct electricity?
Graphite is soft lubricant and good conductor of electricity as it has pi bonds. The pi bonds of graphites are are one over another so it is soft lublicant and as it has pi bond so it can conduct electricity.
What makes graphite a good lubricant?
The carbon atoms are strongly bonded together in sheets. Because the bonds between the sheets are weak, graphite shows lower shearing strength under friction force. Thus it can be used as a solid lubricant and has become one of traditional and primary solid lubrication materials.