ASVAB Electronics Fundamentals and Circuits 2

Question 1

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

Accepted Answer

50Ω

Answer

For two equal resistors in parallel: R_total = R ÷ 2 = 100 ÷ 2 = 50Ω. The general formula is 1/R_total = 1/R1 + 1/R2.

Question 2

What does a capacitor do in a circuit?

Accepted Answer

Store energy in an electric field

Answer

A capacitor stores electrical energy in an electric field between two conducting plates separated by an insulating material (dielectric). It can charge and discharge rapidly.

Question 3

What is the unit of electrical resistance?

Accepted Answer

Ohm

Answer

Electrical resistance is measured in ohms (Ω), named after Georg Simon Ohm. One ohm is the resistance that allows one ampere of current to flow when one volt is applied.

Question 4

What is the purpose of a diode?

Accepted Answer

Allow current to flow in only one direction

Answer

A diode is a semiconductor device that allows current to flow in only one direction (forward bias) and blocks it in the reverse direction. It acts as a one-way valve for electricity.

Question 5

If a 12V battery is connected to a 4Ω resistor, how much current flows?

Accepted Answer

3A

Answer

Using Ohm's Law: I = V ÷ R = 12 ÷ 4 = 3 amperes.

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB - Armed Services Vocational Aptitude Battery Practice Test

ASVAB Electronics Fundamentals and Circuits 2