Question:medium
A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if:
A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if:
Show Hint
At constant voltage:
\[
H\propto \frac{1}{R}
\]
Changing radius affects resistance quadratically.
Updated On: Mar 23, 2026
- both the length and the radius of the wire are halved
- both the length and the radius of the wire are doubled
- the radius of the wire is doubled
- the length of the wire is doubled
Show Solution
The Correct Option is C
Solution and Explanation
Was this answer helpful?
0
Top Questions on Current electricity
An infinitely long straight wire carrying current $I$ is bent in a planar shape as shown in the diagram. The radius of the circular part is $r$. The magnetic field at the centre $O$ of the circular loop is :
- JEE Main - 2026
- Physics
- Current electricity
- For two identical cells each having emf \(E\) and internal resistance \(r\), the current through an external resistor of \(6\,\Omega\) is the same when the cells are connected in series as well as in parallel. The value of the internal resistance \(r\) is ________ \(\Omega\).
- JEE Main - 2026
- Physics
- Current electricity
The heat generated in 1 minute between points A and B in the given circuit, when a battery of 9 V with internal resistance of 1 \(\Omega\) is connected across these points is ______ J.
- JEE Main - 2026
- Physics
- Current electricity
- On increasing the temperature of a conductor, for free electrons ______ increases.
- GUJCET - 2026
- Physics
- Current electricity
- Want to practice more? Try solving extra ecology questions todayView All Questions