What is a typical value for the order of magnitude of the resistivity of copper?
Correct answer: A. 10-8 Ωm
- A. 10-8 Ωm
- B. 10-10 Ωm
- C. 10-6 Ωm
- D. 102 Ωm
Explanation
a) 10^-8 Ωm:This option suggests a resistivity value of 10^-8 Ωm for copper. Resistivity is a measure of a material's intrinsic resistance to electric current flow. Copper is known to be a good conductor of electricity, and its resistivity is relatively low. The value of 10^-8 Ωm is a typical order of magnitude for the resistivity of copper.
This question appeared on the HEC Phase II 2017 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Resistance and Resistivity
Resistance measures opposition to current in a conductor and follows R = V/I for an ohmic conductor, while resistivity is an intrinsic property of the material. Questions use R = ρL/A, examine effects of length, cross-sectional area and temperature, and distinguish resistance, resistivity, conductance and conductivity.
Practise Current Electricity
1,052 free Current Electricity MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Resistance and Resistivity questions
Wheatstone Bridge is used to:
With the help of a slide wire bridge, the greatest accuracy will be achieved in measuringan unknown resistance, when
A filament lamp behaves like an Ohmic conductor when its temperature
If a voltage of 9V is applied across the end of a conductor and the current flowing through the conductor is 1ampere, what would be the resistance?
A wire is stretched so that its radius of cross section becomes half, then resistance of wire will be:
If length of the wire becomes two times to its orignal value and area becomes one half to its orignal value, than resistance of the wire becomes: