3B Scientific Electroscope S User Manual

3B SCIENTIFIC® PHYSICS

Electroscope S 1009964

Instruction Sheet

02/13 ALF

1 Stand base

2 Frame

3 Electroscope unit

4 Aluminium rod with magnet holder

1. Description

The electroscope S is used for the demonstration of electrical charges and voltages.

The electroscope features a plastic frame set on a base. The actual electroscope unit, consisting of a support and a pointer, is attached to an aluminium rod with a magnetic holder which is suspended within the frame.

2. Equipment supplied

1 Stand base 1 Frame 1 Electroscope unit 1 Aluminium rod with magnet holder

3. Technical Data

Dimensions: 280x80x280 mm3 approx. Weight: 500 g approx.

4. Operation

To perform experiments, the following equipment is also required:

Friction rods 1002709

Friction rod

Rubbing material

Charge polarity

PVC Plastic foil +

Acrylic glass

Plastic foil -

To indicate the charge polarity the following equipment is recommended:

Charge Indicator 1009962

4.1 Electroscope set-up

• Insert the frame into the base.

• Slide the aluminium rod vertically into the

frame.

• Attach the electroscope unit to the magnetic

holder.

• Place the pointer needle in such a way that

it automatically points to zero.

4.2 Charging up the electroscope by touching it with a statically charged body

• Rub the friction rod with the suitable mate-

rial.

• Touch the aluminium rod with the charged

rod. The pointer deflects.

• Remove the friction rod, the pointer remains

deflected.

• Touch aluminium rod with your hand. The

pointer returns to normal.

• Repeat the experiment with the second fric-

tion rod.

• Determine the sign of the charge using the

charge indicator.

4.3 Using electrostatic induction to charge up the electroscope

• Approach but do not touch the aluminium

rod with the statically charged friction rod. The pointer deflects.

• Remove the friction rod. The pointer returns

to normal.

• Again approach the aluminium rod with the

statically charged friction rod. Once again the pointer deflects.

• Briefly touch the aluminium rod with your

finger to discharge 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 a statically-

charged friction rod

Fig. 2 Charging the electroscope using electrostatic

induction

3B Scientific GmbH ▪ Rudorffweg 8 ▪ 21031 Hamburg ▪ Germany ▪ www.3bscientific.com

Subject to technical amendments