Q3 Scenario: Discharge the electroscope and charge itagain with the rubber rod. Rub the perspex rod with silk and bringit close to the metal disk on top of the electroscope, but do nottouch the disk! Go back and forth with the perspex rod severaltimes without touching the metal disk. (Pretend you have a magicwand and you’re casting a spell on the electroscope).
a) What happens when you rub the perspex rod with silk and bringit close to the metal disk on top of the electroscope, but withouttouching the disk? Explain.
b) When observing the oscillations of the needle, what directiondoes the electroscope needle go as you bring the rod closer to themetal disk? Explain.
c) What causes the electroscope needle to deflect in thatmanner? Explain.
d) Does the perspex rod have the same or opposite charge as theneedle? Explain.
