ASVAB Electronics Practice Test 1 2

Question 1

A circuit has a resistance of 10 ohms and a current of 3 amperes flowing through it. What is the voltage across the resistor?

Accepted Answer

30 volts

Answer

3.3 volts

Answer

13 volts

Answer

0.3 volts

Question 2

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

Accepted Answer

To store electrical energy in an electric field and release it

Answer

To amplify the current flowing through the circuit

Answer

To convert AC voltage to DC voltage

Answer

To limit the current to a safe level

Question 3

In a parallel circuit with three branches, if one branch is open (broken), what happens to the other two branches?

Accepted Answer

The remaining two branches continue to operate normally

Answer

All current stops flowing in the entire circuit

Answer

The voltage across the remaining branches drops to zero

Answer

The resistance of the remaining branches doubles

Question 4

A transformer steps voltage up from 120V to 480V. If the primary coil has 200 turns, how many turns does the secondary coil have?

Accepted Answer

800 turns

Answer

50 turns

Answer

200 turns

Answer

400 turns

Question 5

Which electronic component allows current to flow in only one direction?

Accepted Answer

Diode

Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 6

What does an inductor do when the current through it suddenly increases?

Accepted Answer

It opposes the change in current by generating a back electromotive force (EMF)

Answer

It instantly allows the increased current to pass through unchanged

Answer

It stores the extra current as an electric charge

Answer

It converts the current increase into a voltage decrease