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Lesson : Combination Circuit Exercises

Before you dive into the multiples exercises, you can find a cheat sheet for Ohm’s law, Power law, series and parallel circuit at this page.  You can find the cheat sheet for Voltage Divider, Kirchhoff’s laws and combination circuit at this page. This will be useful to solve the exercises.


Exercise 1: 

In this exercise, we want to find every missing values. Let’s assume R_1 = 10kΩ (10000), R_2 = 10kΩ (10000), R_3 = 3kΩ (3000), R_4 = 1.5kΩ (1500) and R_5 = 2kΩ (2000). We want to find V_1, V_2 and V_3. We also want to find I_1, I_2, I_3, I_4 and I_5. I_1 is the current flowing into R_1, I_2 is the current flowing into R_2 and so on.

(Note : k means you multiply the number by a thousand)

For the current, make sure to choose the appropriate unit. (uA or microamps is multiply by 10^{-6}, mA or milliamps is multiply by 10^{-3}). uA is one millionth of an ampere and mA is a thousandth of an ampere.

Exercise 1 : Combination circuit
V_{1}: Volt

V_{2}: Volt

V_{3}: Volt

I_{1}:

I_{2}:

I_{3}:

I_{4}:

I_{5}:



Exercise 2: 

In this exercise, we want to find every missing values. Let’s assume R_1 = 1kΩ (1000), R_2 = 1kΩ (1000), R_3 = 2kΩ (2000), R_4 = 3kΩ (3000) and R_5 = 4kΩ (4000). We want to find V_1 and V_2. We also want to find I_1, I_2, I_3, I_4 and I_5. I_1 is the current flowing into R_1, I_2 is the current flowing into R_2 and so on. You will also need to calculate the total current flowing into the circuit I_{tot}.

(Note : k means you multiply the number by a thousand)

For the current, make sure to choose the appropriate unit. (uA or microamps is multiply by 10^{-6}, mA or milliamps is multiply by 10^{-3}). uA is one millionth of an ampere and mA is a thousandth of an ampere.

Exercise 2 : Combination circuit
V_{1}: Volt

V_{2}: Volt

I_{1}:

I_{2}:

I_{3}:

I_{4}:

I_{5}:

I_{tot}:


You now have completed the Chapter 2 of Learn Electronics. In the next chapter, we will move on to a different topics. We are not done yet with resistors but we will dive into the digital world of electronics before coming back to more complex resistors circuits. Like this chapter, you will have examples and exercises at the end of chapter 3.