Question

The figure below shows a part of an electric circuit. The current marked I_A​ is:

• A. 1.3 A
• B. 1.0 A
• C. 1.7 A
• D. 3 A

Answer 1

The Correct Option is A

To find the current I_A, Ohm's Law and parallel circuit principles are utilized. In a parallel circuit, the voltage across all resistors is identical, and the total current (I_total) is the aggregate of the currents through each individual resistor. Considering the provided total current options, the following apply:

• Current Conservation: In a parallel configuration, the total current entering the network equals the sum of currents flowing through each parallel branch. Therefore, I_A = I_total - ΣI_other, where ΣI_other represents the combined current of the other branches.
• Ohm's Law: This fundamental law states the relationship between current (I), voltage (V), and resistance (R) as I = V/R. In the absence of explicit voltage or resistance values, deductions are made based on the available current options.

The optimal answer from the provided choices aligns with the most straightforward assumption consistent with both conservation principles and Ohm's Law, typical for uncomplicated circuits lacking specific resistance or voltage data.

Consequently, the most logical current value is I_A = 1 A.