Kirchhoff's Law - IB Physics B.5 - Part 3 (Bonus)

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Full playlist of IBDP Physics B.5 Current and circuits

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00:00 Kirchhoff's Law and other concepts
16:31 Practice 1
22:00 Practice 2
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Correction (thanks for Ryan)
Practice 1
I_1 = -0.1428571429 ... ~= -0.143A

LouisWongPhysics
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You are actually such as incredible teacher thank you so much for the help🙌

robzzz
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Mr.Wong at 24:45 how can you equate (1)x2 + (2) I understand that you could equate them by using the 0's but I don't understand the algebra behind your method

robzzz