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Five Styrofoam balls are suspended from ...

Five Styrofoam balls are suspended from insulating threads. Several experiments are performed on the balls and the following observations are made:
(i) Ball A repels C and attracts B.
(ii) Ball D attracts B and has no effect on E.
(iii) A negatively charged rod attracts both A and E.
An electrically neutral Styrofoam ball gets attracted if placed nearby a charged body due to induced charge. What are the charges, if any, on each ball A,B,C,D, and E?

A

`++-+O+`

B

`+-++O`

C

`+-+OO`

D

`-+-OO`

Text Solution

Verified by Experts

The correct Answer is:
C
From (i) A and C both are charged, eithe positively or negatively. From (ii) B is charged and D and E have no charge. From (iii) A is postively charged. Therefore from Eq. (i) B is negatively charged.
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