9. Short Answer A.) charged metal spheres are connected by a copper wire, as sho
ID: 2077225 • Letter: 9
Question
9. Short Answer A.) charged metal spheres are connected by a copper wire, as shown in the figure. The radius of sphere A is larger than that of sphere B. The spheres are sepa- rated by a distance much larger than their radii. Which of the following quantities must be the same for both spheres? (4 pts) (1) their electric charge (2) their electric potential (3) their capacitance (4) their capacitance and electric potential (5) none of the above B.) A small magnetic is falling through a cylindrical metal tube as shown in bar the figures below. Which of the five figures correctly represents the induced currents in the cylinder due to the magnet downward motion plain your answer. (4 pts) (4) (2) (3)Explanation / Answer
Q9A
Since there radius is different ,therefore they will have different capacitance and different charges .When they are connected by the wire ,potential across the will be same so answer is 2
Q9B
According to lenzs law
North face is coming towards the bottom part,so induced current will oppose its motion.current induced in bottom will be anticlockwise
For upper part ,southern face is moving away ,so upper face will act as North Pole ,so current will be clockwise
So the answer will be 1
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