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19/07/2021 1:59 pm
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A 4 Ω coil and a 2 Ω coil are connected in parallel. What is their combined resistance? A total current of 3 A passes through the coils. What current passes through the 2 Ω coil?
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19/07/2021 2:03 pm
4Ω and 2Ω coil are connected in parallel.
Combined resistance is R
\(\frac{1}{R}\) = \(\frac{1}{4}\) + \(\frac{1}{2}\) = \(\frac{3}{4}\)
R = \(\frac{4}{3}\)Ω
Total current I = \(\frac{V}{R}\) = 3Ω
\(\frac{V}{\frac{4}{3}}\) = 3
V = 3 x \(\frac{4}{3}\) = 4 V
Current through 2Ω coil = \(\frac{V}{2}\) = \(\frac{4}{2}\) = 2A