https://file.aiquickdraw.com/mathbot/file/17261449534798jt4w1f0.jpg

https://file.aiquickdraw.com/mathbot/file/17261450179317rnk0le6.jpg

https://file.aiquickdraw.com/mathbot/file/17261450179328gsb264t.jpg

це досліди 1 та 2 та саме питання 

To solve the problem in **experiment 1** and **experiment 2** from the images you uploaded, let's go through the steps carefully:

1. **In Experiment 1**:
   - You are measuring the current \( I_1 \), and from the image, the correct value of current is **0.2 A** (Option B).

2. **In Experiment 2**:
   - You are measuring the voltage \( U_1 \) across the first bulb, and the correct voltage is **2.5 V** (Option B).

### Question 14:
Now, using the formula for resistance:
\[
R_1 = \frac{U_1}{I_1}
\]
Where:
- \( U_1 = 2.5 \, \text{V} \) (from Experiment 2)
- \( I_1 = 0.2 \, \text{A} \) (from Experiment 1)

Substitute the values:
\[
R_1 = \frac{2.5}{0.2} = 12.5 \, \Omega
\]

### Final Answer:
The resistance \( R_1 \) of the first bulb is **13 Ω** (rounded to the nearest whole number).

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Do you have any questions or want more details about this process? Here are some related questions you might find helpful:

1. What is Ohm's Law and how is it applied in circuits?
2. How do voltage and current affect the resistance of a circuit?
3. How does resistance change in series and parallel circuits?
4. What happens to the total resistance when you add more bulbs in series or parallel?
5. What are some common mistakes when measuring voltage and current in experiments?

**Tip:** Always double-check your units when calculating electrical values to avoid confusion!

Using the results from experiments 1 and 2, calculate the resistance R1 of the first lamp using the formula: R1 = U1 / I1. What is R1 in Ω (to the nearest whole number)?

Learn how to calculate the resistance of a lamp using Ohm's Law based on measurements from experiments. The problem covers key concepts like voltage, current, and resistance. Suitable for students in Grades 7-9.

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