ISCET DC Circuit Analysis 3

Question 1

In a series-parallel circuit, two 10Ω resistors are in parallel and that combination is in series with a 5Ω resistor. What is the total resistance?

Accepted Answer

10Ω

Answer

Two 10Ω in parallel = 5Ω; 5Ω + 5Ω in series = 10Ω total.

Question 2

Which law states that the total current entering a junction equals the total current leaving that junction?

Accepted Answer

Kirchhoff's Current Law

Answer

KCL (Kirchhoff's Current Law) is based on conservation of charge at any circuit node.

Question 3

A 12V source delivers 36W to a load. What current flows through the load?

Accepted Answer

3A

Answer

P = V × I, so I = P/V = 36W / 12V = 3A.

Question 4

When using the superposition theorem, what must be done with all independent voltage sources except the one being analyzed?

Accepted Answer

Replace them with short circuits

Answer

Superposition requires deactivating all other independent sources; voltage sources are shorted, current sources are opened.

Question 5

A 1000Ω resistor is color coded as brown-black-red. What is the correct reading?

Accepted Answer

1000Ω

Answer

Brown=1, Black=0, Red=multiplier 100: 10 × 100 = 1000Ω.

(ISCET) International Society of Certified Electronics Technicians Practice Test