
UAS PISAV XI TAV juni 2025
Quiz
•
Engineering
•
11th Grade
•
Practice Problem
•
Medium
Al-lika Fadia Lika
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39 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Mengapa tegangan output tetap 12V meskipun input regulator 15V?
Karena dioda membatasi tegangan
Karena IC 7812 dirancang untuk output tetap
Karena kapasitor menyerap sisa tegangan
Karena transistor menurunkan tegangan
Karena transformator mengatur output
2.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Apa dampak jika transistor Q1 dilepas dari rangkaian?
Tegangan output turun menjadi 9V
IC 7812 terbakar
Arus output menjadi sangat kecil
Tegangan output menjadi 15V
Rangkaian tetap bekerja normal
3.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Bagaimana cara meningkatkan kemampuan arus output dari regulator ini?
Menambah kapasitor
Mengganti IC 7812 dengan 7805
Menambahkan transistor daya
Mengganti trafo menjadi 12V
Menambah resistor di output
4.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Seandainya Anda ingin output 9V, bagaimana modifikasi rangkaiannya?
Ganti 7812 dengan 7809
Tambahkan resistor 3Ω
Ubah kapasitor C2
Ganti transistor NPN dengan PNP
Ubah arus input menjadi 9V
5.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Apa risiko jika adaptor menghasilkan 20V DC, bukan 15V?
Output tetap 12V tanpa masalah
Transistor akan lebih kuat
IC 7812 bisa panas berlebih atau rusak
Kapasitor menyerap kelebihan tegangan
Output naik jadi 20V
6.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Bagaimana efek jika polaritas kapasitor C1 dibalik?
Tegangan tetap
Output menjadi lebih halus
Kapasitor meledak
Tidak ada pengaruh
Output jadi 9V
7.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
Mengapa IC dan transistor digunakan secara paralel dalam regulator ini?
Untuk mempercepat aliran arus
Untuk memperbesar tegangan
Untuk menambah kapasitas arus dan efisiensi kerja IC
Untuk mengurangi kapasitor
Agar IC tidak digunakan sama sekali
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