ASVAB Electronics Information Practice Test 380650 Results

Your Results Global Average
Questions 5 5
Correct 0 3.67
Score 0% 73%

Review

1

You would measure the amount of voltage between two points in a circuit with a(n):

83% Answer Correctly

battery

reostat

voltmeter

ammeter
Solution

Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.

2

Voltage and current are __________ proportional.

66% Answer Correctly

not

indirectly

directly

inversely
Solution

Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.

3

Why is an insulator a poor conductor of electricity?

68% Answer Correctly

an insulator has few free electrons

an insulator has many free electrons

an insulator is made of organic material

an insulator is made of inorganic material
Solution

Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.

4

Which of the following can conduct electricity under some conditions but not others?

83% Answer Correctly

conductor

resistor

insulator

semiconductor
Solution

Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.

5

Which of the following will increase the magnetic field produced by the electric current in a wire?

68% Answer Correctly

wind the wire into a coil

wrap the wire around a ceramic core

construct the wire from conductive material

construct the wire from insulative material
Solution

A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.