Question 1

In the circuit shown, what is the magnitude and direction of the current in segment B ($$I_B$$)?

Accepted Answer

$$I_B = 1\ \mathrm{A}$$, to the right

Question 2

Using the junction rule at the node where the 5 A current splits, what is the value of the current in segment C ($$I_C$$)?

Accepted Answer

$$I_C = 2\ \mathrm{A}$$, to the right

Question 3

If the current entering the leftmost junction is $$5\ \mathrm{A}$$ and the current leaving the bottom branch is $$2\ \mathrm{A}$$, what is the current through the middle branch labeled $$3\ \mathrm{A}$$?

Accepted Answer

$$3\ \mathrm{A}$$, to the right

Question 4

Which law is used to determine the relationship between the currents at the junctions in the circuit shown?

Accepted Answer

Kirchhoff's Junction Rule (Conservation of Charge)

Question 5

If the current in segment B was reversed, what would be the new value of the current in segment C to maintain conservation of charge at the junction?

Accepted Answer

$$I_C = 1\ \mathrm{A}$$, to the right

Question 6

If the total current entering the network is $$5\ \mathrm{A}$$ and the sum of the currents leaving through B and C is not equal to $$5\ \mathrm{A}$$, what does this indicate?

Accepted Answer

The circuit violates conservation of charge

Question 7

If the current in segment B is $$1\ \mathrm{A} to $$the right and in segment C is $$2\ \mathrm{A} to $$the right, what is the current through the diagonal branch between the two junctions?

Accepted Answer

$$3\ \mathrm{A}$$, to the left

Question 8

If the current in the bottom branch is increased to $$3\ \mathrm{A}$$, what must the current in the top branch (B) be to maintain conservation of charge at the rightmost junction?

Accepted Answer

$$1\ \mathrm{A}$$

Question 9

If the current in the middle diagonal branch is reversed, what effect does this have on the current distribution in the rest of the circuit?

Accepted Answer

It changes the direction of current in B and C

Question 10

What is the sum of the currents entering and leaving any junction in the circuit, according to Kirchhoff's Junction Rule?

Accepted Answer

The sum of currents entering equals the sum of currents leaving

Applying Conservation of Charge to Junctions in Circuits

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