Please verify questions 1-3 X and Y are two initially uncharged metal spheres on
ID: 2077774 • Letter: P
Question
Please verify questions 1-3 X and Y are two initially uncharged metal spheres on insulating stands, and they are in contact with each other. A negatively charged rod R is brought close to X as shown in part (a) of the figure. Sphere Y is now moved away from X, as shown in part (b). What are the final charge states of X and Y? A) Both X and Y are neutral. B) X is negative and Y is positive. C) X is neutral and Y is positive. D) Both X and Y are negative. X is positive and Y is negative. Two small oppositely charged balls are a certain distance apart. The vectors in the figure show magnitude and direction of the electrostatic force on each ball due to the other one. Suppose charge on the left ball is now double. Which vector diagram below best represents the forces that now act on each of the balls? The figure shows two unequal charges, +q and -Q. Change -Q has greater magnitude than charge +q. Point X is midway between the charges. In what section of the line will there be a point where the resultant electric field is zero? A) WX B) VW C) XY D) YZ E)Not possibleExplanation / Answer
1) E IS CORRECT . WHEN YOU MOVE NEGATIVE CHARGED ROD CLOSE TO X ALL NEGATIVE CHARGES IN X WILL FLOW IN Y DUE TO WHICH Y WILL BE NEGATIVE AND X WILL BE POSITIVE.
2) A IS CORRECT . ELECTROSTATIC FORCE BETWEEN TWO CHARGES IS ALWAYS EQUAL AND OPPOSITE ALSO SINCE CHARGE IS DOUBLED THE FORCE WILL ALSO BE DOUBLED.
3) B IS CORRECT . AS IN VW PART THE POINT WILL BE CLOSER TO SMALLER CHARGE THUS COMPENSATING FOR ITS SMALLER CHARGE AND IN THIS REGION THE FIELDS DUE TO THE CHARGES ARE IN OPPOSITE DIRECTIONS.