Question

Three small identical balls have charges –3 × 10−12 C, 8 × 10−12 C and 4 × 10−12 C
respectively. They are brought in contact and then separated. Calculate (i) charge on
each ball (ii) number of electrons in excess or deficit on each ball after contact.

Answer 1

Given : Three small identical balls have charges –3 × 10¯¹²C, 8 × 10¯¹²C and 4 × 10¯¹² C

respectively. They are brought in contact and then separated.

To find : charges on each ball = average charge

= (-3 × 10¯¹²C + 8 × 10¯¹² + 4 × 10¯¹²)/3

= 3 × 10¯¹² C

Therefore charge on each ball is 3 × 10¯¹² C

since the charge is positive, electrons are removed from each ball. i.e., electrons in deficit on each ball after contact.

number of electrons in deficit = 3 × 10¯¹²/(1.6 × 10¯19)

= 1.875 × 10^7

also read similar questions : A body having an excess of 10 ^6 electrons is placed in an electric field of 1000 n /c towards east. find out the magnit...

https://brainly.in/question/3463417

An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55 × 10 4 N C ...

https://brainly.in/question/4601126