Eric is doing electrostatics experiments. In experiment 1, he takes two identica
ID: 1524284 • Letter: E
Question
Eric is doing electrostatics experiments.
In experiment 1, he takes two identical glass rods, A and B. Both glass rods are initially electrically neutral and have no electrical charges induced in anyway. He carefully placed the glass rod B on a spinner. Then he rubbed the red-colored end of the glass rod A with silk cloth, and brought it near one end of the glass rod B on the spinner as illustrated in the figure below which is a view from above.
In experiment 2, Eric put an electrically neutral copper rod of the same size as the glass rod A. He again rubbed the red-colored end of the glass rod A with silk cloth and brought it near one end of the copper rod on the spinner as shown in the figure below.
Which of the following does most accurately describe the results of the two experiments when the spinners are observed from above?
Eric is doing electrostatics experiments. In experiment 1, he takes two identical glass rods, A and B. Both glass rods are initially electrically neutral and have no electrical charges induced in anyway. He carefully placed the glass rod B on a spinner. Then he rubbed the red-colored end of the glass rod A with silk cloth, and brought it near one end of the glass rod B on the spinner as illustrated in the figure below which is a view from above In experiment 2, Eric put an electrically neutral copper rod of the same size as the glass rod A. He again rubbed the red-colored end of the glass rod A with silk cloth and brought it near one end of the copper rod on the spinner as shown in the figure below. (Experiment 1) glass rod A glass rod B spinner (Experiment 2) glass rod A copper rod spinner Which of the following does most accurately describe the results of the two experiments when the spinners are observed from above? O In experiment 1 the rod on the spinner spins counter-clock-wise, and in experiment 2 the rod on the spinner spins clock wise. O In experiment 1 the rod on the spinner spins clock-wise, and in experiment 2 the rod on the spinner does not move at all. In both experiments, the rod on the spinner spins counter-clock wise. O In both experiments, the rod on the spinner spins clock-wise. O In experiment 1 the rod on the spinner spins clock-wise, and in experiment 2 the rod on the spinner spins counter-clock-wise. O In experiment 1 the rod on the spinner spins counter-clock-wise, and in experiment 2 the rod on the spinner does not move at all.Explanation / Answer
On rubbing with silk the electrons get transferred from rod to silk making rod positively charged.
when this charged rod is brought near a neutral rod it will polarize the rod and attract toward itself.
Same thing will happen when it is brought near a metal rod.
Hence int both cases the left end of both rods on spinner will move towards the charged rod hence spining clockwise.
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