$\"\"$

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(1)

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Step 1:

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Observe the circuit.

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The resistors $\"\"$ and $\"\"$ are in parallel.

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The equivalent resistance is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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The resistors $\"\"$ and $\"\"$ are in parallel.

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The equivalent resistance is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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Step 2:

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Redraw the circuit replacing the resistors by $\"\"$ and $\"\"$ .

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$\"\"$

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The current passing through the resistor $\"\"$ is $\"\"$ .

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Since $\"\"$ and $\"\"$ are in series, the current flowing the resistor $\"\"$ is same.

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Equivalent series resistamce is $\"\"$ .

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$\"\"$

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Equivalent series resistamce is $\"\"$ .

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Voltage applied to the circuit, voltage across $\"\"$ and $\"\"$ are equal, since they are connected in parallel.

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$\"\"$ .

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Voltage drop across $\"\"$ is $\"\"$ .

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$\"\"$

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Therefore, voltage applied to the circuit is 40 V.

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Solution :

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Voltage applied to the circuit is 40 V.

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(2)

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Step 1:

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Find the current $\"\"$ passing through the resistor $\"\"$ .

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Observe the equivalent circuit.

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Find the voltage drop across the resistor $\"\"$ .

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Voltage drop across aross $\"\"$ is $\"\"$ .

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$\"\"$

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Voltage drop across aross $\"\"$ is $\"\"$ .

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$\"\"$ is the parallel combination of $\"\"$ and $\"\"$ .

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Since $\"\"$ and $\"\"$ are in parallel, the current flowing through $\"\"$ is $\"\"$ .

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$\"\"$ .

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Therefore current passing through the resistor $\"\"$ is $\"\"$ .

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Step 2:

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Find the current $\"\"$ passing through the resistor $\"\"$ .

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The current flowing through $\"\"$ is $\"\"$ .

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$\"\"$ .

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Therefore current passing through the resistor $\"\"$ is $\"\"$ .

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Solution:

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Current passing through the resistor $\"\"$ is $\"\"$ .

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Current passing through the resistor $\"\"$ is $\"\"$ .

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(3)

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Step 1:

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Find the current $\"\"$ passing through the resistor $\"\"$ .

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Find the voltage drop across the resistor $\"\"$ is $\"\"$ .

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$\"\"$ is the parallel combination of $\"\"$ and $\"\"$ .

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Since $\"\"$ and $\"\"$ are in parallel, the current flowing through $\"\"$ is $\"\"$ .

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$\"\"$ .

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Therefore current passing through the resistor $\"\"$ is $\"\"$ .

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Step 2:

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The current flowing through $\"\"$ is $\"\"$ .

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$\"\"$ .

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Therefore current passing through the resistor $\"\"$ is $\"\"$ .

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Solution:

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Current passing through the resistor $\"\"$ is $\"\"$ .

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Current passing through the resistor $\"\"$ is $\"\"$ .