1.
Gambar berikut merupakan magnet jarum yang didekatkan dengan magnet batang yang sudah ditentukan kutubnya.Posisi kutub – kutub magnet jarum yang benar ditunjukkan oleh gambar….
Correct Answer
A. 1 dan 2
Explanation
The correct answer is 1 dan 2. This means that the correct position of the pole-pole of the needle magnet is indicated by pictures 1 and 2.
2.
Ada 3 buah magnet batang. Jika C kutub utara B dengan C tolak menolak, serta D dengan E tarik menarik, jenis kutub magnet pada A dan F adalah
Correct Answer
D. A kutub selatan, F kutub selatan
Explanation
Based on the given information, we know that C repels B, which means they have the same polarity and are both North poles. Additionally, D attracts E, indicating that they have opposite polarities and D is a North pole. Since A is attracting C, A must have the opposite polarity of C, which is a South pole. Similarly, since F is attracting E, F must have the opposite polarity of E, which is also a South pole. Therefore, the correct answer is A kutub selatan, F kutub selatan.
3.
Magnet batang yang tergantung bebas selalu menghadap ke arah utara selatan, karena dalam bumi terdapat kemagnetan yang ...
Correct Answer
D. Letak kutubnya berlawanan dengan magnet batang
Explanation
The correct answer is "letak kutubnya berlawanan dengan magnet batang." This is because the Earth's magnetic field is generated by its core, which has a magnetic field that is aligned in the opposite direction to the magnetic field of a bar magnet. As a result, the north pole of a bar magnet is attracted to the Earth's south magnetic pole, causing the bar magnet to always point towards the Earth's north magnetic pole.
4.
Jika sepotong magnet dipotong-potong menjadi 3 bagian sama panjang, maka kutub-kutub yang benar dari potongan magnet tersebut adalah ...
Correct Answer
A.
Explanation
Jika sepotong magnet dipotong-potong menjadi 3 bagian sama panjang, maka kutub-kutub yang benar dari potongan magnet tersebut adalah satu potongan dengan kutub utara di satu ujung dan kutub selatan di ujung lainnya, sedangkan dua potongan lainnya akan memiliki kutub yang sama dengan potongan sebelumnya.
5.
Penyebab jarum kompas selalu menunjuk Utara dan Selatan bumi adalah ...
Correct Answer
A. Adanya gaya tarik menarik antara jarum kompas dengan magnet bumi
Explanation
The correct answer is "adanya gaya tarik menarik antara jarum kompas dengan magnet bumi" because the compass needle is a small magnet that aligns itself with the Earth's magnetic field. This magnetic force causes the needle to always point towards the Earth's magnetic North and South poles.
6.
Kelompok bahan yang bersifat non magnetik adalah ...
Correct Answer
D. Alumunium dan seng
Explanation
Aluminium and zinc are non-magnetic materials. They do not possess magnetic properties and are not attracted to magnets. On the other hand, steel and iron are magnetic materials and can be attracted to magnets. Therefore, the correct answer is aluminium and zinc.
7.
Yang dimaksud dengan medan magnet adalah ....
Correct Answer
C. Daerah yang berada dalam pengaruh gaya magnet
Explanation
The correct answer is "daerah yang berada dalam pengaruh gaya magnet" which translates to "the area that is under the influence of magnetic force". This explanation suggests that a magnetic field refers to the region or area where the force of magnetism is present or exerted. It implies that within this field, objects or particles will experience the effects of magnetic force.
8.
Di bawah ini merupakan alasan mengapa kutub utara magnet selalu menunjukan arah utara kutub bumi!
Correct Answer
B. Disekitar kutub utara bumi ada kutub selatan magnet bumi
Explanation
The reason why the north pole of a magnet always points towards the north pole of the Earth is because there is a south pole of the Earth's magnet located near the north pole of the Earth. This creates a magnetic attraction between the north pole of the magnet and the south pole of the Earth's magnet, causing the north pole of the magnet to always point towards the north pole of the Earth.
9.
Bila magnet yang digantung didekati magnet lainnya, manakah gambar yang paling benar?
Correct Answer
D.
Explanation
The correct answer is Gambar 3. Ketika magnet yang digantung didekati oleh magnet lain, magnet tersebut akan terpengaruh oleh gaya tarik menarik antara kedua magnet. Dalam Gambar 3, magnet yang digantung akan tertarik ke arah magnet yang didekati. Posisi magnet yang digantung akan berubah menjadi lebih dekat dengan magnet yang didekati.
10.
Arah garis gaya magnet antara dua kutub magnet adalah ...
Correct Answer
B.
11.
Benda yang ditarik kuat oleh magnet yaitu ...
Correct Answer
B. Ferromagnetik
Explanation
Ferromagnetik adalah bahan yang dapat ditarik kuat oleh magnet. Bahan ini memiliki sifat magnetik yang kuat dan dapat mempertahankan magnetisasi bahkan setelah medan magnet dihilangkan. Beberapa contoh bahan ferromagnetik adalah besi, nikel, dan kobalt.
12.
Sebatang besi dapat dimagnetkan dengan cara berikut, kecuali ......
Correct Answer
C. Memanaskan besi yang menempel pada magnet
Explanation
When iron is heated, its magnetic properties are not affected. Therefore, heating iron that is attached to a magnet will not demagnetize it.
13.
Logam yang termasuk ferromagnetik adalah
Correct Answer
D. Besi
Explanation
Iron is considered a ferromagnetic material because it exhibits a strong attraction to magnetic fields. Unlike other metals such as tin, copper, and aluminum, iron has unpaired electrons that align in the same direction when exposed to a magnetic field, resulting in a strong magnetic response. This property makes iron suitable for use in magnets and magnetic materials.
14.
Benda yang ditolak oleh magnet yaitu ........
Correct Answer
C. Diamagnetik
Explanation
Diamagnetik adalah benda-benda yang ditolak oleh magnet. Mereka memiliki medan magnetik yang lemah dan cenderung menghasilkan medan magnetik yang berlawanan dengan medan magnet eksternal. Ini menyebabkan mereka ditolak oleh magnet.
15.
Kelompok benda berikut yang tergolong benda magnet adalah ........
Correct Answer
D. Besi, baja, kobalt
Explanation
The correct answer is besi, baja, kobalt. These materials are classified as magnetic substances because they have the ability to attract or repel other magnetic materials. Iron and steel (baja) are well-known magnetic materials, while cobalt is also highly magnetic. Copper (tembaga) and glass (kaca) are not magnetic materials and therefore do not belong to this group. Nickel is a magnetic material, but it is not included in the given answer.
16.
Perhatikan gambar kedua magnet berikut :
Correct Answer
A. A kutub utara dan C kutub utara
Explanation
The correct answer is "A kutub utara dan C kutub utara" because in the given image, both magnets A and C have their north poles facing upwards. According to the rules of magnetism, like poles repel each other, so if both magnets have their north poles facing upwards, they will repel each other. Therefore, the correct answer is that both A and C have north poles.
17.
Di bawah ini merupakan alasan mengapa kutub utara magnet selalu menunjukan arah utara kutub bumi ....
Correct Answer
B. Disekitar kutub utara bumi ada kutub selatan magnet bumi
Explanation
The correct answer is "disekitar kutub utara bumi ada kutub selatan magnet bumi" because magnetism works in a way that opposite poles attract each other. Since the Earth's magnetic field is aligned in such a way that the magnetic North Pole is near the geographic North Pole, the North Pole of a compass needle, which is a magnet, will point towards the North Pole of the Earth's magnetic field, which is actually a South Pole.
18.
Cara membuat magnet dan kutub yang terbentuk pada gambar adalah ........
Correct Answer
A. Induksi, P kutub S
Explanation
The correct answer is "induksi, P kutub S". The explanation for this answer is that the process described in the question is the creation of a magnet and the formation of poles. Induksi refers to the process of magnetization, where a material becomes magnetized due to the presence of a magnetic field. P kutub S indicates that the magnet formed has a north pole (P) and a south pole (S). Therefore, the answer "induksi, P kutub S" is the most suitable explanation for the given question.
19.
Sudut deklinasi adalah ........
Correct Answer
D. Sudut yang dibentuk magnet dengan arah utara bumi
Explanation
The correct answer is "sudut yang dibentuk magnet dengan arah utara bumi". This is because sudut deklinasi refers to the angle between the magnetic field and the geographic north pole. It represents the difference between true north and magnetic north, which is caused by the Earth's magnetic field.
20.
Gambar garis gaya magnet yang benar adalah ........
Correct Answer
B.
21.
Pada gambar berikut yang merupakan sudut inklinasi adalah .......
Correct Answer
A. 1
Explanation
The correct answer is 1 because it is the only option that represents an inclined angle. The other options (2, 3, and 4) are all horizontal lines and do not indicate any inclination.
22.
Membuat magnet dengan cara digosok adalah ........
Correct Answer
C.
Explanation
Membuat magnet dengan cara digosok adalah salah satu cara untuk menghasilkan magnet. Ketika benda magnetik seperti besi atau logam lainnya digosok dengan magnet, partikel-partikel magnetik pada benda tersebut akan terpolarisasi dan menghasilkan medan magnetik. Proses ini disebut juga sebagai magnetisasi. Sehingga, dengan digosok menggunakan magnet, benda tersebut dapat menjadi magnet sementara yang memiliki kemampuan untuk menarik benda-benda logam kecil atau berperilaku seperti magnet.
23.
Serbuk besi yang ditaburkan pada sebuah magnet batang hanya melekat pada ujung-ujungnya saja sebab .......
Correct Answer
B. Merupakan bagian medan magnet paling kuat
Explanation
The correct answer is "merupakan bagian medan magnet paling kuat." The explanation for this is that iron filings are attracted to the strongest part of the magnetic field, which is typically at the ends of the magnet. The magnetic field is weaker in the middle of the magnet, so the iron filings do not stick to that area.
24.
Berdasarkan gambar di bawah ini, kutub magnet batang B adalah .....
Correct Answer
A. Kutub selatan di B1, kutub utara di B2
Explanation
Based on the given image, the direction of the magnetic field lines indicates that the magnetic field is flowing from B1 to B2. According to the right-hand rule, the direction of the magnetic field lines indicates the direction of the magnetic field. Therefore, B1 must be the south pole (kutub selatan) and B2 must be the north pole (kutub utara).
25.
Perhatikan gambar pembuatan magnet secara gosokan di bawah ini, maka kutub magnet pada batang B adalah .......
Correct Answer
A. Kutub S terletak di B1, kutub U di B2
Explanation
The correct answer is "kutub S terletak di B1, kutub U di B2". This means that the South pole (kutub S) is located at B1 and the North pole (kutub U) is located at B2. This is based on the image of the rubbing process shown, which indicates the direction of magnetization.