Q73 / 90 · JEE Main 2021 (20 Jul Shift 1) · Physics
A current of is passing through a non-linear magnesium wire of cross-section . At every point the direction of current density is at an angle of with the unit vector of area of cross-section.
The magnitude of electric field at every point of the conductor is: (resistivity of magnesium )
The magnitude of electric field at every point of the conductor is: (resistivity of magnesium )
- A
- B
- Correct answerC
- D
Solution
Now,
Hence, the correct answer is option: 'C'.