kemagnetan dan induksi elektro magnetik
Authored by juwarto jawahir
Science
7th Grade
Used 39+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Batang baja P – Q dibuat menjadi magnet dan setelah menjadi magnet, beberapa kompas diletakkan di sekitar batang baja seperti gambar.
Posisi kompas yang benar ditunjukkan oleh gambar ….
A. 1 dan 2
B. 1 dan 3
C. 2 dan 4
D. 3 dan 4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Magnet jarum berada di antara dua magnet batang. Posisi magnet jarum dan magnet batang yang benar adalah ….
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apabila perbandingan jumlah lilitan primer dan sekunder adalah 100 : 1 maka daya sekunder dan jenis trafonya adalah ….
A. 24 watt, trafo step down
B. 24 watt, trafo step up
C. 12 watt, trafo step down
D. 12 watt, trafo step up
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan gambar berikut!
Jika transformator pada gambar merupakan ideal, besar tegangan listrik terjadi pada lampu adalah ….
A. 55 V
B. 500 V
C. 720 V
D. 880 V
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan tabel transformator berikut!
Pernyataan yang benar tentang transformator P dan Q adalah ….
A. P adalah transformator step down karena Is < Ip
B. P adalah transformator step up karena Vp < Vs
C. Q adalah transformator step up karena Vp > Vs
D. Q adalah transformator step up karena Is > Ip
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan tabel besaran dari 2 buah transformator berikut.
Jenis transformator tersebut dengan alasannya yang benar adalah ….
A
B
C
D
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fungsi trafo adalah untuk …
A. mengubah tegangan dan daya
B. mengubah tegangan arus bolak balik
C. pengatur tegangan arus searah
D. membuat arus searah menjadi bolak balik
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