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Tentukan  masing masing Efisiensi dan fungsi dari trafo A dan trafo B

Let's solve the efficiency and functions of each transformer (trafo) based on the given information.

### Transformer A
1. **Primary Side (P)**:
   - Voltage (\(V_p\)) = 100 V
   - Current (\(I_p\)) = 1 A
   - Power (\(P_p\)) = 100 W

2. **Secondary Side (S)**:
   - Voltage (\(V_s\)) = 200 V
   - Current (\(I_s\)) = 0.5 A
   - Power (\(P_s\)) = 100 W

#### Efficiency Calculation for Transformer A
Efficiency (\( \eta \)) is defined as:
\[
\eta = \frac{P_{\text{output}}}{P_{\text{input}}} \times 100\%
\]
Since the output power (\(P_s\)) and input power (\(P_p\)) are both 100 W:
\[
\eta = \frac{100}{100} \times 100\% = 100\%
\]
So, **the efficiency of Transformer A is 100%**.

#### Function of Transformer A
Since the secondary voltage (\(V_s\)) is higher than the primary voltage (\(V_p\)), Transformer A is a **step-up transformer**, meaning it increases the voltage from primary to secondary.

---

### Transformer B
1. **Primary Side (P)**:
   - Voltage (\(V_p\)) = 150 V
   - Current (\(I_p\)) = 0.3 A
   - Power (\(P_p\)) = 50 W

2. **Secondary Side (S)**:
   - Voltage (\(V_s\)) = 50 V
   - Current (\(I_s\)) = 1 A
   - Power (\(P_s\)) = 50 W

#### Efficiency Calculation for Transformer B
Again, using the efficiency formula:
\[
\eta = \frac{P_{\text{output}}}{P_{\text{input}}} \times 100\%
\]
With \(P_s = 50 \, \text{W}\) and \(P_p = 50 \, \text{W}\):
\[
\eta = \frac{50}{50} \times 100\% = 100\%
\]
So, **the efficiency of Transformer B is also 100%**.

#### Function of Transformer B
Since the secondary voltage (\(V_s\)) is lower than the primary voltage (\(V_p\)), Transformer B is a **step-down transformer**, meaning it decreases the voltage from primary to secondary.

---

### Summary
- **Transformer A**:
  - Efficiency: 100%
  - Function: Step-up transformer
- **Transformer B**:
  - Efficiency: 100%
  - Function: Step-down transformer

Do you have any questions or need further details?

### Additional Questions
1. What would happen if the current in the primary side of Transformer A increased?
2. Can we achieve efficiencies greater than 100% in practical transformers?
3. How does transformer core material affect efficiency?
4. What losses are typically observed in real-world transformers?
5. How does a change in load affect the efficiency of a transformer?

### Tip
Remember, the efficiency of an ideal transformer is considered 100%, but real-world transformers experience losses due to resistance, core losses, and leakage flux.

Tentukan masing-masing efisiensi dan fungsi dari trafo A dan trafo B.

Understand how to calculate the efficiency and function of two transformers, Trafo A and Trafo B, using concepts of electrical power and voltage transformation. This solution provides step-by-step calculations and explanations, ideal for students in Grades 10-12.

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