CUET · PHYSICS · PYQ PAPER 2023
When a steady current flows in a metalic conductor of non-uniform cross section. Which of these quantities is constant along the conductor?
A. Current
B. Electric field
C. Drift speed
D. Current density
E. Potential gradient
Choose the correct answer from the options given below:
- A D Only
- B A, B and D Only
- C C and E Only
- D A Only
Answer & Solution
Correct Answer
(D) A Only
Step-by-step Solution
Detailed explanation
For a steady current, charge conservation ensures that the current (A) remains constant at every point along the conductor. Other quantities like current density ( \(J=I / A\) ) and drift speed ( \(v_d=I / n A e\) ) vary because they depend on the changing cross-sectional area.…
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