Question

1. Kirchoff’s Rules are defined in terms of loops and junctions. How would you define a “loop” in a circuit? What is a junction?

2. What happens to the reading of the ammeter if you reverse the connections? The voltmeter?

3. Recall that current is just the motion of electric charges. The Junction rule is a practical manifestation of what more fundamental conservation law? What conservation law implies the loop rule?

4. Write a junction equation for the point B1 of Figure 5. Make clear your conventions for currents

5. Write a loop equation for the loop BB1C1CB of Figure 5.

Answer 1

Solution) (1) A Loop is a closed path in an electric circuit .

A junction is defined as a point where atleast three circuit paths meet .

(2) on reversing the connections the ammeter  shows reading in opposite direction that is with negative sign .

Same on reversing the connections of voltmeter also shows reading in opposite direction that is with negative sign .

(3) Junction RULE is conservation of electric charge .

Loop RULE is conservation of energy .

(4) and (5) figure 5 is required but it is not sent .