1.
Perhatikan pernyataan berikut mengenai
sumber arus listrik berdasarkan arahnya!
1)
Memiliki
bentuk tegangan
2)
Memiliki
bentuk tegangan
3)
Memiliki
lambang :
4)
Memiliki lambang
5)
Contoh : listrik PLN, generator AC, dinamo
sepeda
6)
Contoh : elemen volta, baterai, aki
Yang merupakan sumber tegangan
bolak-balik ditunjukkan oleh pernyataan ... .
Correct Answer
C. 2), 3), 5)
Explanation
The correct answer is 2), 3), 5). This is because statement 2) mentions "Memiliki bentuk tegangan" which translates to "Has the form of voltage" and statement 3) mentions "Memiliki lambang :" which translates to "Has the symbol :" and statement 5) gives examples of sources of alternating current (AC) such as PLN electricity, AC generator, and bicycle dynamo. These statements indicate that the source mentioned has an alternating voltage, which is represented by a symbol, and is exemplified by AC sources.
2.
Di bawah ini merupakan larutan
elektrolit yang digunakan beberapa elemen.1) HCl2) KOH3) NH4Cl4) H2SO4Elemen Volta menggunakan larutan elektrolit ... .
Correct Answer
D. 4)
Explanation
The correct answer is 4) H2SO4. Elemen Volta menggunakan larutan elektrolit H2SO4.
3.
Di bawah ini merupakan elektroda yang digunakan beberapa elemen.1) Cu (tembaga)2) Zn (seng)3) C (karbon)4) PbO2 (timbal dioksida)5) Pb (timbal)Elemen Volta menggunakan elektroda ...
.
Correct Answer
D. 1) dan 2)
Explanation
The correct answer is 1) dan 2). This is because in a Voltaic cell, two different metals are used as electrodes, with one metal being the anode and the other being the cathode. In this case, Cu (tembaga) and Zn (seng) are both metals and can be used as electrodes in a Voltaic cell.
4.
Di bawah ini merupakan larutan
elektrolit yang digunakan beberapa elemen.1) PbSO42) KOH3) NH4Cl4) H2SO4Elemen kering (baterai) menggunakan
larutan elektrolit ... .
Correct Answer
C. 3)
Explanation
The correct answer is 3) NH4Cl. The explanation for this is that NH4Cl is an electrolyte because it dissociates into NH4+ and Cl- ions when dissolved in water. In a dry cell battery, the electrolyte is typically a paste or gel that contains NH4Cl, which allows for the flow of ions and the generation of electricity. Therefore, NH4Cl is the most suitable electrolyte for use in a dry cell battery.
5.
Perubahan energi yang terjadi pada saat
baterai digunakan untuk menyalakan lampu senter adalah ... .
Correct Answer
C. Energi kimia --> energi listrik --> energi cahaya
Explanation
When a battery is used to power a flashlight, the energy transformation that occurs is from chemical energy stored in the battery to electrical energy, which is then converted to light energy. This is because the chemical reactions happening inside the battery produce an electric current, which flows through the circuit of the flashlight and powers the light bulb, converting the electrical energy into light energy.
6.
Perhatikan gambar berikut!Jika S3
dan S5 terbuka, maka lampu yang menyala ... .
Correct Answer
B. L1, L2, dan L4
Explanation
Jika S3 dan S5 terbuka, maka lampu yang menyala adalah L1, L2, dan L4.
7.
Perhatikan gambar berikut ini!1) 2)3)4)Pengukuran ggl pada rangkaian listrik di atas
ditunjukkan oleh gambar ... .
Correct Answer
D. 4)
Explanation
The correct answer is 4) because the image shows a voltmeter connected in parallel to the circuit, which is used to measure the voltage across the circuit.
8.
Elemen volta tidak dapat mengalirkan arus listrik dalam waktu yang lama karena ... .
Correct Answer
C. Timbul gelembung gas hidrogen yang menempel pada anoda
Explanation
The correct answer is "timbul gelembung gas hidrogen yang menempel pada anoda." When a voltaic cell is in operation, the anode undergoes oxidation, releasing electrons and producing hydrogen ions. These hydrogen ions then react with the electrons at the cathode to form hydrogen gas. Over time, these hydrogen bubbles can build up on the surface of the anode, reducing the surface area available for the reaction to occur. This can hinder the flow of current and decrease the efficiency of the voltaic cell.
9.
Pada akumulator yang berfungsi sebagai kutub negatif adalah ... .
Correct Answer
A. Lempeng timbal
Explanation
The correct answer is "lempeng timbal" because in an accumulator, the negative electrode is typically made of lead (timbal). This electrode is responsible for storing and releasing electrons during the charging and discharging process of the accumulator.
10.
Batang karbon dalam penampang baterai di samping
ditunjukkan oleh nomor ... .
Correct Answer
A. 1)