A steady current flows in a metallic conductor of non uniform area of crossection which of the following is constant and why (a) current ( b) drift speed (c) current density(d) none

Question

Answer

Current

Answer

a

Answer

current because charge flown per unit time is i.which is independent of area.

Answer

option (a) currentIt's steady conductoer.... drift velocity n current density are not constant..... n current remains constant....!!

Answer

Constant in a Metallic Conductor with Non-uniform Cross-section

Current Density (c)
- The current density is constant in a metallic conductor with a non-uniform cross-section.
- Current density is defined as the amount of current flowing through a unit area perpendicular to the direction of flow.
- In a metallic conductor, the current density remains constant because the total current flowing through the conductor must be the same at any cross-sectional area.
- Even though the cross-sectional area may vary along the length of the conductor, the current density ensures that the total current remains constant.
- Mathematically, current density (J) is given by J = I/A, where I is the current flowing through the conductor and A is the cross-sectional area.

Explanation
- As the current flows through the conductor, the charge carriers experience collisions with the lattice ions, leading to a net drift velocity known as the drift speed.
- The drift speed of the charge carriers may vary depending on the material and conditions, but the current density remains constant.
- Therefore, in a metallic conductor with a non-uniform cross-section, the current density is the constant parameter because it ensures that the total current remains consistent throughout the conductor.

Conclusion
- In conclusion, the current density is constant in a metallic conductor with a non-uniform cross-section because it ensures that the total current flowing through the conductor remains the same at any point along its length.

Similar Class 12 Doubts

A steady current flows in a metallic conductor of non-uniform cross-section. The quantity/quantities constant along the length of the conductor is/are

Statement-1 : Conductivity of a metallic conductor decreases with increase in temperature.Statement-2 : On increasing temperature the number of free electrons in the metallic conductar decreases.

Relation between drift velocity and current density in a metallic conductor?

Which of the following is an ohmic conductor?

In a metallic wire with non uniform area of cross section,constant potential difference is applied across its ends.The parameter that remains constant throughout the wire is?

Top Courses for Class 12

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams