scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 1,162
Background Knowledge Resistance in electricity is a property of any object or substance to resist the flow of an electrical current The quantity of resistance in an electric circuit determines the amount of current flowing in the circuit for any given voltage applied to the circuit The resistance of an object is determined by the nature of the substance of which it is composed its resistivity accounting for its dimensions and its temperature Resistivity is expressed in terms of Ohms cm3 at 20C An electrical conductor is any material that offers little resistance to the flow of an electric current The difference between a conductor and an insulator which is a poor conductor of electricity is one of degree rather than kind because all substances conduct electricity to some extent A good conductor of electricity such as silver or copper may have a conductivity billions of times as great or more as the conductivity of a good insulator such as glass or mica Method We were set the task of investigating the factors that come into play when determining the resistance of a piece of wire We would be provided with the necessary apparatus needed to carry out the investigations The basic setup would involve a circuit with a set of cells connected in series with an ammeter and the piece of wire being investigated and a voltmeter connected in parallel with the wire The ammeter is placed in series with the wire An ammeter has a low resistance so that it introduces as little extra resistance as possible into the circuit The voltmeter is connected in parallel with the wire Voltmeters have a high resistance so the current they take is usually negligible We decided on the variables that could affect the resistance of a wire Length of the wire Thickness of the wire The material used as the wire Temperature
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA