Plusivo DM401B - Page 31

𝐼
1
= 0. 001363 𝐴 + 0. 001223 𝐴
𝐼
1
= 0. 002586 𝐴
Equation 5:
𝐼
2
= (𝐼
3
· 14. 468) + 0. 0638 𝐴
𝐼
2
= (− 0. 003957 𝐴 · 14. 468) + 0. 0638 𝐴
𝐼
2
= − 0. 05725 𝐴 + 0. 0638 𝐴
𝐼
2
= 0. 00655 𝐴
Do not forget that we have supposed the directions of the currents, in the final answer if we get a
positive answer, like and the direction we have supposed is true, but if we get a negative answer,
𝐼
1
𝐼
2
like the direction we have supposed is wrong, so we must reverse it.
𝐼
3
The equation will be changed to:
𝐼
1
= 𝐼
2
+ 𝐼
3
𝐼
2
= 𝐼
1
+ 𝐼
3
Now, it is easy to calculate the voltage on the resistors using Ohm's law:
𝑉 = 𝐼 · 𝑅
The voltage on 2.2 kΩ
𝑉 = 𝐼
1
· 2. 2 𝑘Ω
𝑉 = 0. 002586 · 2200 Ω
𝑉 = 5. 7 𝑉
The voltage on 680 Ω
𝑉 = 𝐼
3
· 680 Ω
𝑉 = 0. 003957 · 680 Ω
𝑉 = 2. 7 𝑉
The voltage on 47 Ω
𝑉 = 𝐼
2
· 47 Ω
𝑉 = 0. 00655 𝐴 · 47 Ω
𝑉 = 0. 3 𝑉
30
Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com