Question
Consider the circuit shown in figure. Find the current through the $10\Omega$ resistor when the switch S is (a) Open (b) Closed.

Answer


  1. When S is open,
$\text{R}_\text{eq}=(10+20)\Omega=30\Omega$
  1. i = When S is closed,
$\text{R}_\text{eq}=10\Omega$

$\text{i}=\Big(\frac{3}{10}\Big)\Omega=0.3\Omega.$

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