JEE Main 202427 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2024
- Date
- 27 January
- Shift
- Evening Shift
- Subject
- Physics
- Chapter
- Current Electricity
JEE Main 2024 · 27 January · Evening Shift · Physics · Current Electricity
Wheatstone bridge principle is used to measure the specific...
Wheatstone bridge principle is used to measure the specific resistance of given wire, having length , radius . If is the resistance of wire, then specific resistance is :
Options
- A
- B
- C
- D
Correct answer
D.
Step-by-step solution
The specific resistance of a material, also known as electrical resistivity, is a measure of how strongly a specific material opposes the flow of electric current.
Specific resistance is an intrinsic property of a material and is dependent on factors such as the material's composition, temperature, and crystal structure. It is the counterpart of conductivity, with which it is inversely proportional.
Hence, even if the length of the wire is doubled, the specific resistance remains the same, i.e., .