Nilima Nilima
  • 0
Enlightened

Question 11: NCERT Class 12th Physics: Chapter 1 – Electric Charges And Fields

  • 0

Question 11: NCERT Class 12th Physics: Chapter 1 – Electric Charges And Fields

A Polythene piece rubbed with wool is found to have a negative charge of 3 × 10-7 C.
(a) Estimate the number of electrons transferred (from which to which?)
(b) Is there a transfer of mass from wool to polythene?

Related Questions

Leave an answer

Leave an answer

1 Answer

  1. Solution:
    (a) q = ne or n =

    = 1.875 × 1012
    so, 1.875 × 1012 electrons have transferred from wool to polythene, as polythene acquires negative charge.
    (b) Yes, mass of 1.875 × 1012 electrons i.e., m = nme = 1.875 × 1012 × 9.1 × 10-3 1 kg = 1.71 × 10-18 kg has transferred from wool to polythene

    Check the complete chapter with solutions.

    NCERT Solutions for 12th Class Physics: Chapter 1-Electric Charges And Fields