ASVAB Electronics Information Test 3

Question 1

What is the primary purpose of a fuse in an electrical circuit?

Accepted Answer

Protect against overcurrent

Answer

A fuse melts and opens the circuit when current exceeds a safe level, protecting components.

Question 2

If a circuit has 12V across a 4-ohm resistor, how much power is dissipated?

Accepted Answer

36 watts

Answer

P = V²/R = 12²/4 = 144/4 = 36 watts.

Question 3

What does the term 'frequency' refer to in AC circuits?

Accepted Answer

The number of complete cycles per second

Answer

Frequency is measured in hertz (Hz) and indicates how many complete cycles occur each second.

Question 4

What type of circuit has only one path for current to flow?

Accepted Answer

Series circuit

Answer

In a series circuit, all components share the same single current path.

Question 5

What is the function of an inductor in an AC circuit?

Accepted Answer

Opposes changes in current

Answer

An inductor opposes changes in current due to its self-induced back-EMF (inductive reactance).

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