Page 166 - Physics Form 5 KSSM_Neat

Direction of Induced Current in a Straight Wire SCAN ME
SCAN ME
and Solenoid To determine
You have observed that the direction of the induced current the direction of
current using a
changes when there is a change in the direction of the relative galvanometer
motion between the conductor and the magnet in Activity 4.10. https://bit.ly/3lhdUMY
Carry out Activity 4.12 and 4.13 to study the direction of the
KEMENTERIAN PENDIDIKAN MALAYSIA
induced current in a straight wire and solenoid.

Activity 4.12
SCAN ME
SCAN ME
Aim: To study the direction of the induced current in a straight wire Video on ways to
Apparatus: Thick copper wire, a pair of Magnadur magnets, use multimeter
sensitive centre-zero galvanometer or digital multimeter,
a dry cell with holder, 1 kΩ resistor and switch https://bit.ly/3gqj3Pa
Material: Connecting wires with crocodile clips
Instructions:
1. Set up the apparatus as shown in Figure 4.24.

Connecting wire
Resistor
20 10 0
30 10
20
Dry cell 30
G
X Y
–
+
Galvanometer

Switch
Figure 4.24
2. Connect the dry cell with its positive terminal at Y and negative terminal at X.
3. Turn on the switch. Observe the direction of deflection of the galvanometer pointer (to the left
or to the right) and record your observation in Table 4.6. Determine the direction of the current
through the dry cell (X to Y or Y to X).
4. Reverse the dry cell so that the positive terminal is A
at X and negative terminal at Y and repeat step 3. Y
5. Remove the dry cell from the circuit and
replace with a piece of thick copper wire. S
X
Place the thick copper wire between the N
pair of Magnadur magnets as shown in Galvanometer
Figure 4.25. B
Copper 30 20 10 0 10 20
6. Move the copper wire upwards (direction A). wire G 30
Observe and record the direction of deflection
of the galvanometer pointer and the direction of
the current through the copper wire in Table 4.6.
7. Repeat step 6 by moving the copper wire Figure 4.25
downwards (direction B).
156 LS 4.2.3