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Let’s go through each of the questions in the exam and analyze them:

### 1. Explanation of a Resistor
A resistor is an electrical component that limits or regulates the flow of electrical current in a circuit. It is used to control voltage and current, dissipate heat, and can protect other components in a circuit.

### 2. Difference between Three-Band and Four-Band Resistor Color Codes
Three-band resistors typically use three colored bands to indicate their resistance value and tolerance. The first two bands indicate the significant digits, and the third band represents the multiplier. Four-band resistors include an additional fourth band, which specifies the tolerance (the degree to which the resistor's actual value may vary from the labeled value).

### 3. Color Code Table
Let’s decode the resistor color bands for each row in the table.

| No | Kode Warna                          | Nilai Pembaca             |
|----|-------------------------------------|----------------------------|
| A  | Coklat, Hitam, Emas, Emas           | 10 Ω, ±5%                 |
| B  | Coklat, Biru, Hijau, Emas           | 16.5 Ω, ±5%               |
| C  | Coklat, Putih, Emas, Emas           | 19 Ω, ±5%                 |
| D  | Coklat, Merah, Hitam, Coklat, Coklat | 120 Ω, ±1%                |
| E  | Coklat, Abu-abu, Hitam, Merah, Perak| 1800 Ω (1.8 kΩ), ±10%     |

*Note*: For colors with multiple bands, check the accuracy based on the resistor color code chart.

### 4. Resistance Table Completion
Using the standard resistor color code chart, let’s determine the color codes for the following resistances:

| No | Nilai Resistor | Kode Warna             |
|----|-----------------|------------------------|
| A  | 10 Ω           | Coklat, Hitam, Hitam  |
| B  | 100 Ω          | Coklat, Hitam, Coklat |
| C  | 120 Ω          | Coklat, Merah, Coklat |
| D  | 1.2 KΩ         | Coklat, Merah, Merah  |
| E  | 1 MΩ           | Coklat, Hitam, Hijau  |

### 5. Series Circuit Calculations
Given resistances: \( R1 = 4 \Omega \), \( R2 = 10 \Omega \), \( R3 = 12 \Omega \), \( R4 = 14 \Omega \). Supply voltage \( V = 220 \text{ V} \).

#### (a) Calculate the Total Resistance
Since the resistors are connected in series, the total resistance \( R_{total} \) is the sum of individual resistances:
\[
R_{total} = R1 + R2 + R3 + R4 = 4 + 10 + 12 + 14 = 40 \Omega
\]

#### (b) Calculate the Current Flowing through the Circuit
Using Ohm's law, \( I = \frac{V}{R_{total}} \):
\[
I = \frac{220 \text{ V}}{40 \Omega} = 5.5 \text{ A}
\]

#### (c) Calculate the Voltage Drop across Each Resistor
For resistors in series, the voltage drop \( V_n \) across each resistor is given by \( V_n = I \times R_n \).

1. \( V1 = 5.5 \, \text{A} \times 4 \Omega = 22 \, \text{V} \)
2. \( V2 = 5.5 \, \text{A} \times 10 \Omega = 55 \, \text{V} \)
3. \( V3 = 5.5 \, \text{A} \times 12 \Omega = 66 \, \text{V} \)
4. \( V4 = 5.5 \, \text{A} \times 14 \Omega = 77 \, \text{V} \)

The sum of these voltage drops should equal the supply voltage (220 V), which verifies the calculations.

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Would you like a detailed explanation of any part, or do you have additional questions?

### Related Questions
1. How do resistors affect the overall current in a circuit?
2. What is the impact of tolerance in resistor values?
3. How do we determine if resistors are in series or parallel?
4. How does the color coding work for precision resistors?
5. How do we calculate total resistance in parallel circuits?

#### Tip
Always double-check resistor values in color codes to avoid incorrect connections in a circuit, which could damage components.

Analyze and solve each of the questions in the Teknik Rekayasa exam. Explain what a resistor is, distinguish between three-band and four-band resistors, decode color codes, complete tables, and solve series circuit calculations.

Explore the basics of resistor color codes, learn the difference between three-band and four-band resistors, and understand series circuit calculations with Ohm's Law. This guide provides a step-by-step solution to a university-level Teknik Rekayasa exam question, covering total resistance, current, and voltage drop calculations.

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