3B Scientific Electroscope - Manual (Page 2)

4
with the earth socket on the power supply and
with the earth socket on the electroscope.
• Use a charge spoon (e.g. U11051) to draw a charge
from the capacitor plate and transfer it to the elec-
troscope.
3.2 Using electrostatic induction to charge up the
electroscope
•
Approach but do not touch the sphere (or capaci-
tor plate) with the statically charged friction rod.
The pointer deflects.
•
Remove the friction rod. The pointer returns to
normal.
• Again approach the sphere with the statically
charged friction rod. Once again the pointer deflects.
•
Briefly touch the sphere with your finger to dis-
charge it. The pointer deflection disappears and
returns to normal.
•
Now remove the friction rod. The pointer again
shows deflection.
Fig. 1: Charging the electroscope using the high-voltage
power supply U21060 Fig. 2: Charging the electroscope using a statically-charged
friction rod
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com • Technical amendments are possible