AFCT Electronics: Circuits and Schematics 2

Question 1

In a series circuit with three resistors of 10 ohms, 20 ohms, and 30 ohms, what is the total resistance?

Accepted Answer

60 ohms

Answer

In a series circuit, total resistance is the sum of all individual resistances. Therefore, 10 + 20 + 30 = 60 ohms.

Question 2

What does a dashed line represent on a standard electrical schematic?

Accepted Answer

A mechanical linkage or connection between components

Answer

On electrical schematics, dashed lines typically represent mechanical linkages or connections between components, such as ganged switches or mechanically coupled variable resistors, rather than electrical connections.

Question 3

According to Kirchhoff's Current Law, what happens at a junction in an electrical circuit?

Accepted Answer

The sum of currents entering the junction equals the sum of currents leaving it

Answer

Kirchhoff's Current Law (KCL) states that the total current entering a junction must equal the total current leaving it. This is based on the conservation of electric charge.

Question 4

On a schematic diagram, what does a zigzag line symbol typically represent?

Accepted Answer

A resistor

Answer

In standard electrical schematics (particularly US conventions), a zigzag line represents a resistor. This is one of the most commonly encountered symbols in circuit diagrams.

Question 5

What is the total resistance of two 100-ohm resistors connected in parallel?

Accepted Answer

50 ohms

Answer

For two equal resistors in parallel, the total resistance is half the value of one resistor. Using the formula 1/R_total = 1/R1 + 1/R2: 1/R_total = 1/100 + 1/100 = 2/100, so R_total = 50 ohms.

(AFCT) Armed Forces Classification Test Practice Test

(AFCT) Armed Forces Classification Test Practice Test

AFCT Electronics: Circuits and Schematics 2