Question:
On increasing the temperature, the resistance of copper and germanium respectively
On increasing the temperature, the resistance of copper and germanium respectively
Updated On: Apr 5, 2025
- increases, decreases
- decreases, increases
- increases for both
- decreases for both
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
The resistance of conductors like copper increases with temperature because of increased collisions between electrons and atoms, which hinders the flow of electric current. On the other hand, for semiconductors like germanium, the resistance decreases with an increase in temperature due to the increased number of charge carriers available at higher temperatures.
The correct option is (A): increases, decreases
Was this answer helpful?
0
0
Top Questions on Resistance
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Physics
- Resistance
- If R is the resistance of a conductor of length l, then
- AP POLYCET - 2024
- Physics
- Resistance
- A resistor of wire 24 cm length and resistance 8Ω is stretched into a uniform wire of 48 cm length, then the new resistance will be:
- COMEDK UGET - 2023
- Physics
- Resistance
- Three resistors of 1 Ω, 0.1 Ω and 0.01 Ω are connected in series combination. Their equivalent resistance is
- AP POLYCET - 2022
- Physics
- Resistance
- Resistance of a wire of length 0.5 m and area of cross-section 10 mm 2 is 1 Ω. The resistivity (in Ω-m) of the wire is
- AP POLYCET - 2022
- Physics
- Resistance
View More Questions
Questions Asked in AP POLYCET exam
- Area of a sector of a circle with radius 4 cm and angle 30° is (use \( \pi = 3.14 \)):
- Two cars are seen from the top of a tower of height 75 m with angles of depression \(30^\circ\) and \(45^\circ\). If the cars are on opposite sides of the tower along the same line, the distance between them is:
- AP POLYCET - 2025
- Heights and Distances
- If assumed mean of a data is 47.5, \( \sum f_i d_i = 435 \) and \( \sum f_i = 30 \), then mean of that data is:
- AP POLYCET - 2025
- Arithmetic Mean
- The heat produced in a \( 4 \, \Omega \) resistor when an electric current of \( 5 \, A \) flows in it for \( 2 \) seconds is
- AP POLYCET - 2025
- Resistance
- Evaluate \( \dfrac{2 \tan 30^\circ}{1 + \tan^2 30^\circ} \)
- AP POLYCET - 2025
- Trigonometric Ratios
View More Questions