ASVAB Electronics Fundamentals and Circuits

Question 1

What is the unit of measurement for electrical current?

Accepted Answer

Ampere

Answer

Electrical current is measured in amperes (amps). One ampere represents the flow of one coulomb of charge per second through a conductor.

Question 2

According to Ohm's Law, what is the relationship between voltage, current, and resistance?

Accepted Answer

V = I × R

Answer

Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R). This fundamental relationship is the basis for most electrical circuit analysis.

Question 3

What is the function of a resistor in a circuit?

Accepted Answer

Limit the flow of current

Answer

A resistor opposes the flow of electrical current, limiting how much current passes through a circuit. It converts electrical energy to heat energy in the process.

Question 4

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

Accepted Answer

60Ω

Answer

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

Question 5

What is the difference between AC and DC current?

Accepted Answer

AC changes direction periodically; DC flows in one direction only

Answer

AC (Alternating Current) periodically reverses direction, typically at 60 Hz in the US. DC (Direct Current) flows in one direction only. Batteries produce DC; power outlets provide AC.

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB Electronics Fundamentals and Circuits