SEKOLAH MENENGAH KEBANGSAAN KEPONG, JLN FRI, KL.
PROGRAM CUTI-CUTI BELAJAR (MEI)
MATA PELAJARAN: FIZIK TINGKATAN: LIMA
NAMA : _________________________________________TINGKATAN :
___________________
1. Diagram (a) and Diagram (b) show a bar magnet is pushed into
a solenoid at a speed of 2 ms-1.
Rajah (a) dan Rajah (b) menunjukkan sebatang magnet bar ditolak
ke solenoid pada kelajuan 2 ms-1.
Galvanometer
2 ms-1
Galvanometer
2 ms-1
Diagram (a) / Rajah (a)
Diagram (b) / Rajah (b)
(a) Explain why the pointer of the galvanometer deflected when
the magnet is pushed into the solenoid
Terangkan mengapa penunjuk galvanometer terpesong apabila magnet
itu ditolak ke solenoid
.....................
[4 marks]
(b) Explain why the deflection of the galvanometer is bigger in
Diagram (b)
Terangkan mengapa pesongan galvanometer lebih besar dalam Rajah
(b)
[4 marks]
(c) What will happen if the speed is increased to 3 ms-1.
Explain your answer
Apakah yang akan berlaku jika kelajuan dinaikkan kepada 3 ms-1.
Terangkan jawapan anda
[4marks]
(d) Why the direction of the current is upward as shown in the
diagram? Explain
Mengapa arah arus adalah menaik seperti yang ditunjukkan dalam
rajah di atas? Terangkan
[4marks]
SKEMA JAWAPAN
PROGRAM CUTI-CUTI BELAJAR (MEI)
(a) 1. Magnet pushed inside, magnetic flux is cut by the
wire
2. According to Faradays Law;
3. emf is induced in the solenoid
4. so, the current is induced
(b) 1. The bigger number of turns, the bigger magnetic flux is
cut by the wire
2. According to Faradays Law;
3. The bigger emf is induced in the solenoid
4. so, the bigger current is induced
(c) 1. The bigger speed, the rate of cutting of magnetic field
is bigger
2. According to Faradays Law;
3. bigger emf is induced in the solenoid
4. so, the bigger current is induced, pointer of the
galvanometer will deflected more
(d) 1. When the N pole is pushed into the solenoid, cutting of
magnetic field occur
2. The current induced produces north pole on the left side,
3. so as to oppose the oncoming magnet, obeying the Lenzs
Law
4. I will flows in anti-clock wise direction
