Charge by Induction Again discharge the electroscope completely by shorting it out. Remove the wire between the metal cup and the electroscope. Charge the rubber rod and bring it close (not too close) to the knob. Observe that the leaves diverge as expected. Now, have your lab partner short out the electroscope knob once again momentarily to the ground wire, this time with the charged rod nearby. Notice what the leaves do. After the proof plane has been removed, withdraw the rod once again to a place far from the apparatus. Notice the motion of the leaves. (a) How did the movable leaf behave during each phase of the procedure? Sketch and explain what happened. (b) What did the electrons do during each phase? Explain also how the electrons got on or off from the electroscope during the experiment. The latter procedure is called charging by induction, and the resulting charge on the electroscope is called an induced charge. (c) If without changing any connections you bring the charged rubber rod back to the same position where it was during the charge by induction procedure, the leaf will collapse. If you now bring it just slightly closer, the leaf will stand out again. Withdrawing the rod slowly, you will see the leaf first collapse briefly and then stand out again. Verify this for yourselves. Sketch the electroscope, rubber (or PVC) rod, and charges and explain what the electrons are doing during all of this
Charge by Induction Again discharge the electroscope completely by shorting it out. Remove the wire between the metal cup and the electroscope. Charge the rubber rod and bring it close (not too close) to the knob. Observe that the leaves diverge as expected. Now, have your lab partner short out the electroscope knob once again momentarily to the ground wire, this time with the charged rod nearby. Notice what the leaves do. After the proof plane has been removed, withdraw the rod once again to a place far from the apparatus. Notice the motion of the leaves. (a) How did the movable leaf behave during each phase of the procedure? Sketch and explain what happened. (b) What did the electrons do during each phase? Explain also how the electrons got on or off from the electroscope during the experiment. The latter procedure is called charging by induction, and the resulting charge on the electroscope is called an induced charge. (c) If without changing any connections you bring the charged rubber rod back to the same position where it was during the charge by induction procedure, the leaf will collapse. If you now bring it just slightly closer, the leaf will stand out again. Withdrawing the rod slowly, you will see the leaf first collapse briefly and then stand out again. Verify this for yourselves. Sketch the electroscope, rubber (or PVC) rod, and charges and explain what the electrons are doing during all of this
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Question
iv. Charge by Induction
Again discharge the electroscope completely by shorting it out.
Remove the wire between the metal cup and the electroscope.
Charge the rubber rod and bring it close (not too close) to
the knob. Observe that the leaves diverge as expected. Now, have your lab partner short out the
electroscope knob once again momentarily to the ground wire, this time with the charged rod nearby. Notice what the leaves do. After the proof plane has been removed, withdraw the rod once again to a place far from the apparatus. Notice the motion of the leaves.
(a) How did the movable leaf behave during each phase of the procedure?
Sketch and explain what happened.
(b) What did the electrons do during each phase? Explain also how the electrons got on or off
from the electroscope during the experiment. The latter procedure is called charging by induction, and the resulting charge on the electroscope is called an induced charge.
(c) If without changing any connections you bring the charged rubber rod back to the same position where it was during the charge by induction procedure, the leaf will collapse. If you now
bring it just slightly closer, the leaf will stand out again. Withdrawing the rod slowly, you will see
the leaf first collapse briefly and then stand out again. Verify this for yourselves.
Sketch the electroscope, rubber (or PVC) rod, and charges and explain what the electrons are doing during all of this.
Expert Solution
Step 1
Solution:
(a). A rubber rod is charged by rubbing it on the wool and getting the excess amount of negative charge. Thus a charged rubber is negatively charged. When the rubber rod gets closer to the nob of the electroscope, the upper part is attracted by the negative charge, thus becoming positive and the lower part gets negatively charged. Thus, due to the repulsion of the negative charge, the foil is repelled by the rod and diverges.
Now, the electroscope is grounded by a rod placed near the nob. The charges will be redistributed and there will be no net negative and or positive charges. Therefore, no repulsion or attraction occurs and foil comes to its original place.
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