Plusivo DM301B - 8.3.1 Kirchhoffs Current Law; 8.3.2 Kirchhoffs Voltage Law

The measured voltage in this figure is 3.18 V DC.
So if we calculate the new values:
(3.18 𝑉)
2
508..3 Ω
= 19. 9 𝑚𝑊
We can count on our calculation “ ” because the
(3 𝑉)
2
510 Ω
= 0. 0176 𝑊 = 17. 6 𝑚𝑊
theoretical value of 17.6 mW is near the value of 19.9 mW.
If we want to use the current to calculate the power.
The measured current in this figure is 6.2 mA
We can use the first formula which is:
𝑃 = 𝐼 · 𝑉
3. 18 𝑉 · 6. 2 𝑚𝐴 = 0. 0197𝑊 = 19. 7 𝑚𝑊
And the second formula which is:
𝑃 = 𝐼
2
· 𝑅
(6. 2 𝑚𝐴)
2
· 510 Ω = 0. 0196 𝑊 = 19. 6 𝑚𝑊
So all the result of the calculations using the formulas above are near each other’s value: 19.9 mW, 19.7
mW, 19.6 mW
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Mastering the Art of Measurement (DM301B Digital Multimeter) r.01 www.plusivo.com