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Question 13: NCERT Solutions for 12th Class Physics: Chapter 3-Current Electricity
The number density of free electrons in a copper conductor estimated is ,8.5 × 1028 m-3. How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0 × 10-6 m2 and it is carrying a current of 3.0 A.
Solution:
We can first calculate drift velocity of the electrons from the given data I = Aneud
Check the complete chapter with solutions.
NCERT Solutions for 12th Class Physics: Chapter 3-Current Electricity