Page 159 - Physics Form 5 KSSM_Neat

4.2 Electromagnetic Induction CHAPTER 4

Photograph 4.4 shows a musician plucking an electric bass guitar. The guitar pickup consisting of Electromagnetism
Pikap gitar
four magnets and copper coils produces an electric signal by electromagnetic induction. How does
electromagnetic induction produce an electric current without the use of dry cells?
KEMENTERIAN PENDIDIKAN MALAYSIA

Permanent
magnet
Copper coil
Guitar pickup

Photograph 4.4 Components in an electric bass guitar pickup

Activity 4.10

Aim: To study electromagnetic induction in a straight wire and a solenoid
A Straight wire
Apparatus: A pair of Magnadur magnets, copper rod and sensitive centre-zero galvanometer or
digital multimeter
Material: Connecting wires with crocodile clips
Instructions:
1. Set up the apparatus as shown in Figure 4.16.

10 0 10 20 30 Galvanometer
20
30
G
SCAN ME
SCAN ME
– +
Video on
Copper electromagnetic
A rod induction in a
straight wire
C
https://bit.ly/34ulaiS
D

B Magnadur
magnet

Figure 4.16
2. Hold the copper rod stationary between the poles of the magnet as shown in Figure 4.16.
Observe the reading of the galvanometer.

LS 4.2.1 149