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On the contrary, insulators have higher resistance than conductors. Resistance refers to resisting a flow of electricity, making it more difficult for electricity to flow. Conductors conduct electricity, they make it easy for electricity to flow. Insulators prevent the flow of electricity.
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Can insulators offer resistance to the flow of electric current?
Yes, different grades of insulators can offer different levels of resistance to current flow of electrons within a closed circuit. For instance the flow of current would be different between wood and rubber, both insulators.
Is cotton clothing a insulator or a conductor?
Short answer: No Long answer: I assume you are wondering this on a heat basis, rather than an electrical one. Things can be either conductors or insulators. Conductors conduct heat well, like copper, and insulators don't conduct heat, like cotton. This is due to the moleules being closer together, as in metal solids, which means the heat waves travelling through them do not diminish so quickly.
What happens to the resistance of a material with a positive temperature coefficient when it is heated?
Positive Temperature coefficient indicates that the resistance of material INCREASES with rise in the temperature. Resistance Temperature COefficient(RTC) is defined as increase in resistance per unit original resistance per unit rise in temperature. Temperature Coefficient of Resistance=R2-R1/(R1*(T2-T1)) Where: R2:Resistance at temperature T2 R1:Resistance at temperature T1 SO from formula it is clear that if resistance increases with temperature(T2-T1>0 and R2>R1) then Difference R2-R1 will be positive hence RTC will have positive value. But if with increase in temperature(T2-T1>0) resistance decreases(R2<R1) then difference R2-r1 will be negative hence RTC will be negative.
Why a hair dryer has a high- heat setting with a lower resistance than the low-heat setting?
Because a higher resistance would have resulted in more heat loss, but the higher is he current, the more energy is lost to heat. Therefore, a lower resistance would release more heat.AnswerPower is equal to voltage squared divided by resistance. So, for a given voltage, the lower the resistance the higherthe power.
Why is the shirt hotter than a white shirt?
Dark coloured shirts are thermal conductors, so they attract more heat. White shirts are thermal insulators, so they get rid of heat. that's why you should wear a white shirt in the summer.
Can insulators offer resistance to the flow of electric current?
Yes, different grades of insulators can offer different levels of resistance to current flow of electrons within a closed circuit. For instance the flow of current would be different between wood and rubber, both insulators.
Do Conductors conduct heat more slowly than insulators?
No, a conductor (of heat) will conduct heat more efficiently than an insulator.
Is metal a better conducter than plastic?
Plastic, wood and paper are insulators and very poor conductors of electricity.
Why are some conductors better than others?
well because the particle theory, the conduction makes the conductors have small particles or big so the big ones move faster so they are conductors and the small ones are the insulators
Are scissors conductors or insulators?
Depends on what they're made of, not what they are.Anything made of a conducting material is a conductor, whatever it is.Anything made of an insulating material is an insulator, whatever it is.Material properties - conducting or insulating - is more important than shape.Scissors are generally - but not always - made of metal.And metals are usually conductors, making the scissors conductors.But a scissor might have plastic handles. Plastic is usually an insulator, which would make the handles insulators.
Why is brick a better condutor of heat than air?
Because they act as insulators because of their thickness therefore are better conductors of heat :)
Does aluminum have lower resistance than copper?
No, aluminum has a higher resistance than copper.
Materials that does not allow an electric current to pass through it easily?
Electrical insulators. Plastics, glass, and rubber. Materials that composition consists of stable elements like Helium. Non-metal.If a material does not allow charges to move through it easily, what is it called?Insulators such as wood does not allow insulators to move through them very easily nor freely .Insulators do not allow electrical charges to flow easily through them. They are the opposite of a conductor which is good at letting molecules pass through it.A conductor like wire allows current to flow. All conductors have some resistance. Semi-conductors are what make up integrated circuits, diodes, transistors and many similar devices. They are typically used with much lower currents than you would see in household appliances, for example.
What causes low voltage to the transmission selonoid?
Cables aren't perfect conductors, they have a bit of resistance. This resistance cacuse a certain voltage drop. But the drop isn't proportional to the voltage running through the cable, so at lower voltages the proportion lost to internal resistance in the cable will be bigger than at higher voltages.
Is something that has low resistance conductors?
Yes, because anything that has low resistance definately have the ability to conduct much better than that of higher resistance. Resistance simply means the opposition to the flow of electrons in a conductor.
Is the ohmic resistance of your body higher or lower than that of the surrounding air?
Your body has a lower resistance than the surrounding air. That is why you should not go outside in a lightening storm!
Are substances like wood and plastic better heats conductors like metal?
We find that metal is a better conductor of heat than plastic or wood.
