FREE AFCT Electronics Information Questions and Answers

Question 1

What is the primary function of a capacitor in an electronic circuit?

Accepted Answer

To store electrical energy

Answer

A capacitor stores energy in an electric field between two conductive plates. This ability allows it to smooth out voltage fluctuations, filter signals, and store energy for later release. Resistors resist current, transistors amplify signals, and diodes are used in rectifiers to convert AC to DC.

Question 2

A technician measures a current of 2 amperes (A) flowing through a component with a resistance of 6 ohms (Ω). According to Ohm's Law, what is the voltage across the component?

Accepted Answer

12 V

Answer

Ohm's Law states that Voltage (V) = Current (I) × Resistance (R). In this scenario, V = 2 A × 6 Ω, which equals 12 V.

Question 3

Which of the following materials is considered the best electrical conductor commonly used in wiring?

Accepted Answer

Copper

Answer

Copper is an excellent electrical conductor, allowing electricity to flow with very little resistance, which is why it is widely used for electrical wiring. Silver is slightly more conductive but more expensive. Rubber, glass, and wood are electrical insulators.

Question 4

In a simple series circuit, three resistors are connected to a power source. If a fourth resistor is added to this series circuit, what happens to the total resistance?

Accepted Answer

It increases.

Answer

In a series circuit, the total resistance is the sum of all individual resistances (R_total = R1 + R2 + R3 + ...). Therefore, adding another resistor will always increase the total resistance of the circuit.

Question 5

To correctly measure the voltage drop across a single resistor in a powered circuit, how must a voltmeter be connected?

Accepted Answer

In parallel with the resistor

Answer

A voltmeter measures the difference in electrical potential between two points. To measure the voltage across a component, the voltmeter's probes must be connected in parallel, with one probe on each side of the component.

(AFCT) Armed Forces Classification Test Practice Test

(AFCT) Armed Forces Classification Test Practice Test

FREE AFCT Electronics Information Questions and Answers