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Electric Charges and Fields
Question
Wired Faculty App

A glass rod rubbed with silk acquires a charge + 1.6 x 10–12 C. What is the charge on the silk?

Answer

Charge on silk is equal and opposite to charge on glass rod
             i.e., q = – 1.6 x 10–12 C.

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Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point? 

Figure shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?