1.

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`

Answer» Correct Answer - 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.


Discussion

No Comment Found

Related InterviewSolutions