Question:
If R is the resistance of a conductor of length l, then
If R is the resistance of a conductor of length l, then
Updated On: Apr 26, 2025
- \(R∝\frac 1l\)
- \(R∝l\)
- \(R∝\sqrt l\)
- \(R\) is independent of \(l\)
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
The resistance (R) of a conductor is directly proportional to its length (l) and inversely proportional to its cross-sectional area (A).
$$R = \rho \frac{l}{A}$$ where $\rho$ is the resistivity of the material.
Therefore, $R \propto l$.
Was this answer helpful?
2
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
- 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
- On increasing the temperature, the resistance of copper and germanium respectively
- 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