Question

A glass rod when rubbed with silk acquires +100 micro coulombs. Is there any transfer of mass? If yes then how much?

Answer 1

Answer:

The glass rod acquires a charge of +19.2×10-19C. (iii) Since an electron has a finite mass (me=9×10-31kg), there will be transfer of mass from glass rod to silk cloth. ... Mass transferred =12×(9×10-31)=1.08×10-29kg.

Answer 2

Answer:

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Explanation:

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Class 12

PHYSICS

COULOMB LAW AND ELECTRIC FIELD

A glass rod is rubbed with a silk cloth. The glass rod acquires a charge of

. <br> (i) find the number of electrons lost by glass rod. <br> (ii) Find the negative charge acquired by silk. <br> (iii) Is there transfer of mass from glass to silk?

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Text Solution

Solution :

(i) The number of electrons lost by galss rod is <br>

<br> (ii) Chaege on silk is

. <br> (iii) Since an electron has a finite mass

, there will be transfer of mass from glass rod to silk cloth. Mass transferred

. <br> Note that mass transferrred is negligibly small. This is expected because the mass of an electrons is extremely small.