Question

Determine current in 3 ohm resistance and potential
difference between A and
B in the adjoining circuit Diagram​

Answer 1

Answer:

see the attachment please

Explanation:

Hope the answer will help you

Answer 2

The current in 3-ohm resistance is 1 A

The potential difference between A and B is 2 V.

Given: A circuit diagram.

To Find: The current in 3-ohm resistance and the potential difference between A and B.

Solution:

• We know that for two voltage sources in the same direction ( positive facing positive or negative facing negative), the resultant voltage will be the difference between both the voltage sources.
• We also know that if resistors are in series connection, then the same current will remain constant, that is the same current will flow through all of them.
• We know that in a parallel connection, the voltage remains constant and so the voltage across resistors in a parallel connection is always constant.

Coming to the numerical,

According to the first bullet point, the resultant voltage will be,

The resultant voltage = 5 V - 2 V

                                    = 3 V

Since the 3-ohm resistor is in a series connection so the current is constant,

Current in 3 ohm resistor = 3 V / 3

                                          = 1 A

Now, we can observe that the 2-ohm resistor is in parallel to the 2 V voltage source. Hence, we can understand that the voltage between A and B points will be the same as the voltage across the resistor, as per the third bullet point.

So, the resistance across A and B = 2 V

Hence, the current in 3-ohm resistance is 1 A

The potential difference between A and B is 2 V.

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