Passage V
Students studied electric forces between charged spheres using the apparatus shown in Figure 1.
In each trial, the students mounted 2 uncharged conducting spheres D cm apart on the stands. Then they placed a negative charge on each sphere. The electric force between the spheres caused Stand 2's sphere to move away from Stand 1's sphere, thereby twisting the vertical wire clockwise (see Figure 2).
The students twisted the wire counterclockwise until Stand 2's sphere had moved back to its original position. The angle through which they twisted the wire,
27. Suppose that in any of the trials in Studies 1 and 2, the students had placed a positive charge on Sphere B. How would the direction of motion of Sphere B have been affected? Sphere B would have moved:
Your Answer is
Correct Answer is C
Explanation
In Study 1 & 2, both spheres A and B are negatively charged. If A remains unchanged and B is positively charged, then opposites attract and B will move towards A