Page 103 - Physics Form 5 KSSM_Neat

Activity 3.1 Teacher’s Demonstration CHAPTER 3

Safety Precaution
Aim: To study electric fields by using an electric field kit Safety Precaution Electricity
Apparatus: Electric field kit and extra high tension (E.H.T.) • Do not touch any metallic part while
power supply using the E.H.T. power supply.
Materials: Olive oil and semolina powder • Ensure that the E.H.T. power
KEMENTERIAN PENDIDIKAN MALAYSIA
Instructions: supply is switched off when no
observation is being recorded.
1. Set up the apparatus as shown in Figure 3.1.

4 6 4 6
2 8 2 8
SCAN ME
SCAN ME
0 10 0 10
Metal rods Demonstration
video of an electric
+ –
field kit
E.H.T. power https://bit.ly/2EIDqKb
supply
Metal plate
electrodes
SCAN ME
SCAN ME
Worksheet
Olive oil Petri dish
(Table 3.1)
Figure 3.1
2. Scan the QR code and print Table 3.1. https://bit.ly/3b7dWT1
3. Pour olive oil into a petri dish.
4. Sprinkle semolina powder on the surface of the olive oil.
5. Switch on the E.H.T. power supply and observe the movement of the semolina powder.
6. Record your observation in Table 3.1.
7. Repeat steps 3 to 6 with a pair of electrodes of different shapes as shown in Table 3.1.
Results:
Table 3.1
Shape of electrodes Electrodes Electric field

Two point electrodes + –

+ –

A point electrode and
+ – –
a plate electrode
–
+ –
–
–

Two parallel plate + –
electrodes + –
+ –
+ –
+ –
+ –

3.1.1
LS 3.1.1 93