CUET · PHYSICS · PYQ PAPER 2025
A steady current flows in a metallic conductor of non-uniform cross-section. The quantity that is constant along the length is
- A Both current and electric field
- B Drift speed only
- C Both current and drift speed
- D Current only
Answer & Solution
Correct Answer
(D) Current only
Step-by-step Solution
Detailed explanation
According to the law of conservation of charge, a steady current must remain constant at every cross-section of a conductor. Since the area of cross-section varies, quantities like drift speed ( \(\left.v_d=\frac{I}{n A_e}\right)\) and electric field must change to maintain that…
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