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Asked Mar 1, 2019
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Example Problems
1. A 12 V battery with an internal resistance of 1 ohm is connected to four aWW
1229
other resistors as shown at right. Find (a) the voltage across and the
Γ
t
current through each resistor. (b) the voltage Vab across the battery. and
(c) the the electrical potential at point c.
6Ω
Solution 1:
(Find equivalent resistance and work backward to get voltage and
current.)
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Example Problems 1. A 12 V battery with an internal resistance of 1 ohm is connected to four aWW 1229 other resistors as shown at right. Find (a) the voltage across and the Γ t current through each resistor. (b) the voltage Vab across the battery. and (c) the the electrical potential at point c. 6Ω Solution 1: (Find equivalent resistance and work backward to get voltage and current.)

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Expert Answer

Step 1

To find the voltages and current in the given circuit, equivalent resistance is required.

First 1Ω and 2Ω are in series connection, their equivalent is 1+2= 3Ω. (fig:a)

This 3Ω and 6Ω are in parallel, their equivalent is (3*6)/(3+6)=2Ω. (fig:b)

Now, 1Ω, 2Ω and 3Ω are in series, their equivalent is, Req= 1+2+3 = 6Ω. (fig:c)

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Step 2

Using Ohm’s Law, find the total current in the circuit, i.e., 

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Step 3

Cuurent in each resistance is required to know to find the voltage across each resistance.

From the circuit, given,

As the internal resistance 1Ω and external resistance 3Ω ar...

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