Copper and carbon wires are connected in series and the combined resistor is kept at 
. Assuming the combined resistance does not vary with temperature, the ratio of the resistances of carbon and copper wires at 
is (temperature coefficients of resistivity of copper and carbon respectively are 
and 
)
Text Solution
Verified by ExpertsThe correct answer is:
B
Given, temperature coefficient of carbon,
Temperature coefficient of copper,
Hence, 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Two cylindrical rods of uniform cross-section area A and 2 A, having free electrons per unit volume…
A copper wire is connected across an ideal battery. The drift velocity of the electrons is v. If an…
The dimensional formula of mobility is
A current flows in a wire of circular cross-section with the free electrons travelling with a mean …
A wire has a non-uniform cross-sectional area, as shown in the figure. A steady current i flows thr…
A uniform copper wire carries a current i amperes and has q charge carriers percubic meter. The len…