AFCT Electronics: Circuits and Schematics 3

Question 1

In a circuit diagram, what does a triangle symbol pointing toward a line represent?

Accepted Answer

A diode

Answer

A triangle pointing toward a perpendicular line is the standard schematic symbol for a diode. The triangle represents the anode side, and the line represents the cathode, indicating the direction of conventional current flow.

Question 2

What is the voltage drop across a 15-ohm resistor when 2 amps of current flows through it?

Accepted Answer

30 volts

Answer

Using Ohm's law (V = I × R): V = 2 amps × 15 ohms = 30 volts. The voltage drop across a resistor is directly proportional to both the current through it and its resistance.

Question 3

What type of circuit has multiple paths for current to flow?

Accepted Answer

Parallel circuit

Answer

A parallel circuit provides multiple paths (branches) for current flow. If one branch is broken, current continues to flow through the remaining branches, unlike a series circuit where a single break stops all current.

Question 4

On a schematic, what does the symbol of two parallel lines (one straight, one curved) represent?

Accepted Answer

An electrolytic capacitor

Answer

Two parallel lines where one is straight and one is curved represent an electrolytic (polarized) capacitor. The curved plate indicates the negative terminal, distinguishing it from a non-polarized capacitor shown with two straight lines.

Question 5

What happens to total current in a series circuit if you add another resistor?

Accepted Answer

Total current decreases

Answer

Adding a resistor in series increases total resistance, and since current equals voltage divided by resistance (I = V/R), the total current decreases with a fixed voltage source.

(AFCT) Armed Forces Classification Test Practice Test

(AFCT) Armed Forces Classification Test Practice Test

AFCT Electronics: Circuits and Schematics 3