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Chapter 21: Q20CQ (page 772)

Apply the junction rule to junction b in figure below. Is any new information gained by applying the junction rule at \({\rm{e}}\)? (In the figure, each emf is represented by script \({\rm{E}}\).)

Short Answer

Expert verified

No new information is gained by applying junction rule at e.

Step by step solution

01

Step 1: Kirchhoff's first law

Kirchhoff's first law states that at a junction in an electrical circuit, the sum of currents flowing into the junction is equal to the sum of currents flowing out of the junction.

02

Junction rule at b and e

According to the diagram given above, If we apply junction rule at b we get:

\({I_1} = {I_2} + {I_3}\)

and if we apply junction rule at\(e\)we get:

\({I_2} + {I_3} = {I_1}\)

Thus, no new information is gained.

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