# Latihan Soal Ukk Elektronika 2012

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Latihan soal pilihan ganda, jumlah soal 40 waktu pengerjaan 25 menit

• 1.

### Kapasitor bertuliskan  2A474J100  mempunyai  nilai ….

• A.

2 Ampere

• B.

474 pF

• C.

470 nF

• D.

100 Volt

C. 470 nF
Explanation
The given answer, 470 nF, is the correct answer because the kapasitor is labeled with the code 2A474J100. In this code, the number 474 represents the capacitance value in picoFarads (pF). Therefore, the capacitance value is 470 nF (nanoFarads), which is equivalent to 470,000 pF.

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• 2.

### Resistor yang mempunyai gelang-gelang : Oranye, Putih , Merah, Emas  nilainya  ….

• A.

2700 â„¦ + 5%

• B.

3900 â„¦ + 5%

• C.

27 Kâ„¦ + 1%

• D.

392 â„¦ + 2%

B. 3900 â„¦ + 5%
Explanation
The answer 3900 â„¦ + 5% is correct because the given resistor has the color bands orange, white, red, and gold. By referring to the resistor color code chart, we can determine that the resistor value is 3900 ohms. The gold band represents a tolerance of 5%, indicating that the actual resistance value could vary by 5% from the stated value.

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• 3.

### Berapakah nilai kapasitor berikut ini?

• A.

0,068 uF

• B.

600 uF

• C.

0,068 nF

• D.

600 nF

A. 0,068 uF
Explanation
The correct answer is 0,068 uF because the unit "uF" stands for microfarads, which is a common unit for measuring the capacitance of a capacitor. The other options, 600 uF, 0,068 nF, and 600 nF, are not the correct answers because they have different units or values.

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• 4.

• A.

Volt

• B.

Ohm

• C.

Ampere

• D.

Explanation
The correct answer is "nano Farad." A capacitor is a device that stores electrical energy in an electric field. The unit used to measure the capacitance of a capacitor is Farad. The prefix "nano" indicates one billionth, so a nano Farad (nF) is a very small unit of capacitance. Therefore, the correct answer is nano Farad.

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• 5.

• A.

Volt

• B.

Ohm

• C.

Ampere

• D.

B. Ohm
Explanation
Satuan resistor adalah ohm. Ohm adalah satuan yang digunakan untuk mengukur resistansi atau hambatan dalam suatu rangkaian listrik. Resistansi mengukur sejauh mana suatu benda atau komponen dapat menghambat aliran arus listrik. Semakin tinggi nilai ohm, semakin besar hambatan yang dimiliki oleh resistor tersebut.

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• 6.

### Resistor 5,6 Kilo â„¦ nilainya sama dengan  ….

• A.

56000â„¦

• B.

5600â„¦

• C.

560â„¦

• D.

56â„¦

B. 5600â„¦
Explanation
The correct answer is 5600â„¦ because 5.6 Kilo â„¦ is equal to 5600â„¦. The "Kilo" prefix represents a multiplier of 1000, so when we convert 5.6 Kilo â„¦ to Ohms, we multiply 5.6 by 1000 to get 5600â„¦.

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• 7.

### Kapasitor yang bertuliskan 2n2 nilainya ….

• A.

22000 pF

• B.

2200 pF

• C.

220 pF

• D.

2,2 pF

B. 2200 pF
Explanation
The correct answer is 2200 pF. The question is asking for the value of a capacitor with the label "2n2". The "n" in this context represents the prefix nano, which is equal to 10^-9. Therefore, "2n2" translates to 2.2 nanofarads (nF). To convert nanofarads to picofarads (pF), we multiply by 1000. So, 2.2 nF is equal to 2200 pF.

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• 8.

### Kapasitor 30 nF dan 60 nF dirangkai seri, maka   nilai totalnya adalah ….

• A.

20 nF

• B.

30 nF

• C.

60 nF

• D.

90 nF

A. 20 nF
Explanation
When capacitors are connected in series, the total capacitance is given by the reciprocal of the sum of the reciprocals of the individual capacitances. In this case, the reciprocals of 30 nF and 60 nF are 1/30 and 1/60 respectively. Adding these reciprocals gives a total of 1/30 + 1/60 = 1/20. Taking the reciprocal of this sum gives a total capacitance of 20 nF.

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• 9.

• A.

Input tegangan

• B.

Penyearah

• C.

Filter

• D.

Amplifier

B. Penyearah
Explanation
The correct answer is "penyearah" because a diode is a component that is commonly used as a rectifier in an adapter. A rectifier is responsible for converting alternating current (AC) to direct current (DC) by allowing current to flow in only one direction. Therefore, "penyearah" is the most suitable option among the given choices.

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• 10.

### Nilai resistor 820 â„¦ + 1 % ; mempunyai warna-warna gelang ….

• A.

Merah; abu-abu; hitam; coklat; coklat

• B.

Abu-abu; merah; hitam; hitam; coklat

• C.

Biru; abu-abu; coklat; emas

• D.

Abu-abu; ungu; merah; emas

B. Abu-abu; merah; hitam; hitam; coklat
Explanation
The given answer "abu-abu; merah; hitam; hitam; coklat" corresponds to the color code for a resistor with a resistance value of 820 â„¦ and a tolerance of 1%. The colors abu-abu, merah, hitam, hitam, and coklat represent the digits 8, 2, 0, and the multiplier 10^0, respectively. The second black band indicates the tolerance level of 1%.

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• 11.

### Gambar berikut merupakan  symbol ….

• A.

Kapasitor

• B.

Resistor

• C.

Induktor / lilitan

• D.

Transistor

C. Induktor / lilitan
Explanation
The given image represents an inductor or a coil. An inductor is an electronic component that stores energy in a magnetic field when an electric current flows through it. It is commonly represented by a coiled wire symbol. Inductors are used in various electronic circuits to control current, filter signals, and store energy.

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• 12.

### Elco singkatan dari  ….

• A.

Electric component

• B.

Elektrolit component

• C.

Electronic coefisien

• D.

Elektrolit condensator

D. Elektrolit condensator
Explanation
Elco adalah singkatan dari elektrolit condensator. Elektrolit condensator adalah komponen elektronik yang digunakan untuk menyimpan energi listrik dalam bentuk medan listrik. Elektrolit condensator memiliki dua terminal yang terhubung oleh elektrolit, yang merupakan cairan konduktif. Elektrolit condensator digunakan dalam berbagai aplikasi elektronik, seperti dalam sirkuit daya atau sirkuit audio, untuk menyimpan dan melepaskan energi listrik dengan cepat.

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• 13.

### Dioda yang berfungsi sebagai penala adalah ....

• A.

Varactor

• B.

Zenner

• C.

LED

• D.

pHoto dioda

A. Varactor
Explanation
A varactor diode is a type of diode that is used as a tuning element in electronic circuits. It is specifically designed to exhibit a variable capacitance when a voltage is applied across its terminals. This variable capacitance property allows the varactor diode to act as a voltage-controlled capacitor, making it suitable for tuning applications such as in radio frequency (RF) circuits. Therefore, a varactor diode can be considered as a tuning element or a "penala" in Indonesian.

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• 14.

• A.

1 %

• B.

10 %

• C.

5 %

• D.

2 %

B. 10 %
Explanation
The letter "K" on a capacitor indicates the tolerance value of the capacitor, which is 10%. Tolerance refers to the acceptable range of variation in the capacitor's value from its stated or nominal value. In this case, the capacitor's actual value can deviate by up to 10% from the stated value.

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• 15.

### Nilai resistor SMD ditunjukkan dengan kode ….

• A.

Angka

• B.

Huruf

• C.

Gelang

• D.

Warna

A. Angka
Explanation
The correct answer is "angka" because the value of SMD resistors is indicated by numerical codes. These numerical codes represent the resistance value in ohms. The code may consist of two or three digits, and each digit corresponds to a specific value. By decoding the numerical code, the resistance value of the SMD resistor can be determined.

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• 16.

### Nilai resistor berikut  adalah ….

• A.

102â„¦ + 1%

• B.

1000â„¦ + 5%

• C.

1000â„¦ + 1%

• D.

102â„¦ + 5%

B. 1000â„¦ + 5%
Explanation
The correct answer is 1000â„¦ + 5%. This is because the value of the resistor is 1000â„¦, and the tolerance is 5%. The tolerance indicates the maximum deviation from the stated resistance value. In this case, the resistor can have a deviation of up to 5% from the stated value of 1000â„¦.

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• 17.

### Resistor SMD dengan kode 3 angka mempunyai nilai toleransi ….

• A.

1 %

• B.

2 %

• C.

5 %

• D.

10 %

C. 5 %
Explanation
The correct answer is 5%. Resistor SMD dengan kode 3 angka memiliki nilai toleransi sebesar 5%. This means that the actual resistance of the resistor can vary by up to 5% from its stated value.

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• 18.

### Resistor SMD dengan kode 4 angka mempunyai nilai toleransi ….

• A.

1 %

• B.

2 %

• C.

5 %

• D.

10 %

A. 1 %
Explanation
Resistor SMD dengan kode 4 angka memiliki nilai toleransi sebesar 1%. Toleransi resistor adalah perbedaan antara nilai resistansi yang sebenarnya dengan nilai resistansi yang ditandai pada resistor. Dalam hal ini, resistor SMD dengan kode 4 angka memiliki toleransi 1%, yang berarti nilai resistansinya dapat berbeda maksimal 1% dari nilai yang ditandai.

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• 19.

### Kapasitor yang nilainya dapat diubah yaitu ….

• A.

Varco dan trimpot

• B.

LDR dsn NTC

• C.

Varco dan trimmer

• D.

Trimmer dan trimpot

C. Varco dan trimmer
Explanation
The correct answer is varco dan trimmer. A varco (variable capacitor) is a type of capacitor that allows the value of capacitance to be adjusted. A trimmer is a type of variable resistor that can also be used to adjust the capacitance in a circuit. Therefore, both varco and trimmer are components that can be used to change the value of capacitance.

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• 20.

### Nilai resistor berikut adalah  ….

• A.

2512â„¦ + 1%

• B.

25,1 Kâ„¦ + 1%

• C.

2512â„¦ + 5%

• D.

251Kâ„¦ + 5%

B. 25,1 Kâ„¦ + 1%
Explanation
The correct answer is 25,1 Kâ„¦ + 1% because it is the only option that matches the given resistor value of 25.1 Kâ„¦ and the tolerance of 1%. The other options either have different resistor values or different tolerance values, so they are not correct.

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• 21.

• A.

Input tegangan

• B.

Penyearah

• C.

Penurun tegangan

• D.

Filter

B. Penyearah
Explanation
Adaptor adalah sebuah perangkat yang digunakan untuk mengubah tegangan listrik dari satu tingkat ke tingkat lainnya. Penyearah adalah salah satu komponen yang terdapat pada adaptor. Penyearah berfungsi untuk mengubah arus bolak-balik menjadi arus searah dengan menggunakan dioda. Dengan adanya penyearah, adaptor dapat mengubah tegangan dan arus listrik sesuai dengan kebutuhan perangkat yang akan digunakan.

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• 22.

### Dioda zenner berfungsi sebagai ….

• A.

Input tegangan

• B.

Penurun tegangan

• C.

Pembatas tegangan

• D.

Penyearahkan tegangan

C. Pembatas tegangan
Explanation
A Zenner diode functions as a voltage regulator by limiting the voltage across it to a specific value. It acts as a "pembatas tegangan" or voltage limiter by allowing current to flow in the reverse direction when the voltage exceeds its breakdown voltage. This prevents the voltage from exceeding a certain level, thus acting as a voltage regulator or "pembatas tegangan".

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• 23.

### LED merupakan singkatan dari ….

• A.

Light emiting diode

• B.

Layer element drive

• C.

Light element dark

• D.

Liquid extended drive

A. Light emiting diode
Explanation
LED stands for "light emitting diode." This is a semiconductor device that emits light when an electric current passes through it. LED technology is widely used in various applications such as lighting, displays, indicators, and many more due to its energy efficiency, long lifespan, and compact size.

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• 24.

• A.

Step-up

• B.

Step-down

• C.

Step-bottom

• D.

Step-top

B. Step-down
Explanation
The correct answer is "step-down". A step-down transformer is used to decrease voltage levels. It has more turns in the primary coil than in the secondary coil, which results in a lower output voltage compared to the input voltage. This type of transformer is commonly used in power distribution systems to reduce high voltage levels for residential and commercial use.

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• 25.

### Trafo yang berfungsi untuk menaikkan tegangan listrik adalah ….

• A.

Step-up

• B.

Step-down

• C.

Step-bottom

• D.

Step-top

A. Step-up
Explanation
The correct answer is "step-up". A step-up transformer is used to increase the voltage of an electrical system. It has more turns in the secondary coil than in the primary coil, which allows it to step up the voltage. This is commonly used in power transmission to increase the voltage for long-distance transmission, reducing energy loss.

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• 26.

### Berikut ini merupakan kaki-kaki transistor FET, kecuali ….

• A.

Kolektor dan emitor

• B.

Drain dan source

• C.

Source dan gate

• D.

Gate dan drain

A. Kolektor dan emitor
Explanation
The given options list different parts of a FET transistor. The correct answer is "kolektor dan emitor" (collector and emitter). This is because in a FET transistor, the corresponding parts are called "drain dan source" (drain and source) and "gate dan drain" (gate and drain). Therefore, "kolektor dan emitor" is not a part of a FET transistor.

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• 27.

### Bagian speaker berfungsi untuk  ….

• A.

Menguatkan getaran listrik

• B.

• C.

• D.

Menyuplai arus listrik ke semua rangkaian

C. Mengubah getaran listrik menjadi suara
Explanation
The correct answer is "mengubah getaran listrik menjadi suara". This is because the function of a speaker is to convert electrical vibrations into sound.

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• 28.

### Bagian tone control berfungsi untuk  ….

• A.

Menguatkan getaran listrik

• B.

Menyuplai arus listrik ke semua rangkaian

• C.

• D.

Explanation
The tone control section of an audio device is responsible for adjusting the frequencies or tones of the sound. It allows the user to increase or decrease specific frequency ranges, such as bass or treble, to achieve the desired sound quality. This adjustment helps in shaping the overall tone or character of the audio output. Therefore, the correct answer, "mengatur nada" (adjusting the tone), accurately describes the function of the tone control section.

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• 29.

### Berikut ini merupakan jenis-jenis transistor, kecuali ….

• A.

FET

• B.

BJT

• C.

IC

• D.

MOSFET

C. IC
Explanation
The given options are all different types of transistors, except for IC. FET stands for Field Effect Transistor, BJT stands for Bipolar Junction Transistor, and MOSFET stands for Metal-Oxide-Semiconductor Field-Effect Transistor. IC, on the other hand, stands for Integrated Circuit, which is not a type of transistor but rather a small electronic device that contains multiple transistors and other components on a single chip.

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• 30.

• A.

Coulomb

• B.

Ohm

• C.

Ampere

• D.

Joule

A. Coulomb
Explanation
The correct answer is Coulomb because coulomb is the unit of electric charge and a capacitor stores electric charge.

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• 31.

### IC singkatan dari ….

• A.

Integrated Circuit

• B.

Internal Circuit

• C.

Integrated Circle

• D.

Intermediate Circuit

A. Integrated Circuit
Explanation
IC is an abbreviation for Integrated Circuit. An integrated circuit is a small electronic device made up of a combination of electronic components, such as transistors and resistors, that are fabricated onto a single chip of semiconductor material. This allows for the miniaturization and integration of complex electronic circuits, making them more efficient and cost-effective. Therefore, the correct answer is Integrated Circuit.

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• 32.

### Berikut ini pembagian IC berdasar jumlah komponennya, kecuali ….

• A.

VLSI

• B.

SSI

• C.

MSI

• D.

LPI

D. LPI
Explanation
The correct answer is LPI. The given options represent different types of integrated circuits based on the number of components they have. VLSI stands for Very Large Scale Integration, SSI stands for Small Scale Integration, and MSI stands for Medium Scale Integration. These terms are commonly used to categorize integrated circuits based on their complexity and the number of components they contain. LPI, however, is not a recognized term in the context of integrated circuits, so it is the exception in this list.

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• 33.

### Berikut ini pembagian IC berdasar jumlah komponennya paling banyak dalam satu keping, yaitu ….

• A.

LSI

• B.

MSI

• C.

SSI

• D.

ULSI

D. ULSI
Explanation
The correct answer is ULSI because ULSI stands for Ultra Large Scale Integration, which refers to the integration of a very large number of components on a single chip. This means that ULSI chips have the capability to contain the highest number of components compared to LSI, MSI, and SSI.

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• 34.

### Penguat power amplifier yang paling banyak dijumpai di pasaran dan paling banyak dipakai adalah ….

• A.

Penguat kelas A

• B.

Penguat kelas B

• C.

Penguat kelas AB

• D.

Penguat kelas D

C. Penguat kelas AB
Explanation
The most commonly found and widely used power amplifier in the market is the class AB amplifier. This type of amplifier combines the advantages of both class A and class B amplifiers. It operates in a way that allows for low distortion levels similar to class A amplifiers, while also providing higher efficiency like class B amplifiers. This makes class AB amplifiers suitable for a wide range of applications, including audio systems, musical instruments, and professional sound reinforcement.

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• 35.

### Penguat power amplifier dengan bentuk gelombang input sama dengan gelombang output adalah ….

• A.

Penguat kelas A

• B.

Penguat kelas B

• C.

Penguat kelas C

• D.

Penguat kelas D

A. Penguat kelas A
Explanation
A class A amplifier is capable of producing an output waveform that is an exact replica of the input waveform. This is because a class A amplifier operates in a linear region where the output devices are biased to conduct throughout the entire input waveform cycle. As a result, the output waveform is a faithful reproduction of the input waveform, making it the correct answer for this question.

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• 36.

### Berikut ini merupakan salah satu bagian dari suatu rangkaian penguat suara, yaitu ….

• A.

Penerima

• B.

Pemancar

• C.

• D.

Pengatur waktu

Explanation
The given options are different components of a sound amplifier system. The correct answer, "pengatur nada," translates to "tone control" in English. This component is responsible for adjusting the frequency response of the audio signal, allowing the user to control the bass, treble, and other tonal qualities of the sound output.

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• 37.

### Rangkaian yang bertugas untuk mengatur nada bass dan treble adalah ….

• A.

• B.

Regulator

• C.

Transmitter

• D.

Tone control

D. Tone control
Explanation
The correct answer is tone control. A tone control circuit is responsible for adjusting the bass and treble frequencies in an audio system. It allows the user to modify the sound output by increasing or decreasing the levels of bass and treble frequencies. This circuit is commonly found in audio receivers and amplifiers to provide a customizable audio experience to the user.

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• 38.

• A.

Ohm

• B.

Joule

• C.

Ampere

• D.

Coulomb

B. Joule
Explanation
The correct answer is Joule because energy stored in a capacitor is measured in joules. Capacitors store electrical energy in an electric field between two conductive plates, and the amount of energy stored depends on the voltage and capacitance of the capacitor. Joule is the unit of energy in the International System of Units (SI), and it is commonly used to measure energy in various forms, including electrical energy. Therefore, the answer Joule is the most appropriate unit for measuring the energy stored in a capacitor.

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• 39.

### Jenis speaker yang mereproduksi sinyal audio frekuensi tinggi adalah ….

• A.

Tweeter

• B.

Woofer

• C.

Full range

• D.

Sub woofer

A. Tweeter
Explanation
A tweeter is a type of speaker that is specifically designed to reproduce high-frequency audio signals. It is responsible for producing clear and detailed sound in the higher frequency range. In contrast, a woofer is designed for low-frequency sounds, a full range speaker can handle a wide range of frequencies, and a subwoofer is specialized for very low-frequency sounds. Therefore, the correct answer in this case is tweeter, as it is the speaker that reproduces high-frequency audio signals.

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• 40.

### Resistor dengan 5 gelang warna mempunyai nilai toleransi ....

• A.

1%

• B.

2%

• C.

5%

• D.

10%

A. 1%
Explanation
The correct answer is 1% because a resistor with 5 color bands typically has a tolerance band. The tolerance band indicates the maximum deviation in the resistor's actual resistance value from its stated value. A 1% tolerance means that the resistor's actual resistance can deviate by a maximum of 1% from its stated value.

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• Jun 16, 2012
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