ASVAB Electronics Information Practice Test 515932 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.57
Score	0%	71%

Review

All electricity is the movement of which subatomic particles?

89% Answer Correctly

	nuclei
	protons
	electrons
	neutrons

Solution

All electricity is the movement of electrons which are subatomic particles that orbit the nucleus of an atom. Electrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer (valence) electron shell.

2 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 20 Ω and current is 4.5 amps.

85% Answer Correctly

	270 V
	90 V
	92 V
	135 V

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

V = \( I \times R \) = \( 4.5 \times 20 \) = 90 V

An engineer who wants to document an electric circuit would create which of the following?

67% Answer Correctly

	a schematic
	a matrix
	a layout
	a blueprint

Solution

A schematic is the proper name for a drawing of an electric or electronic circuit.

From what energy do photovoltaic cells produce electrical energy?

68% Answer Correctly

	nuclear
	sun
	magnetic
	chemical

Solution

A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.

Which of the following is not an advantage of semiconductors over conductors?

50% Answer Correctly

	a semiconductor exhibits increased conductivity with increased temperatures
	a semiconductor's conductivity can be varied under an external electrical field
	materials to produce semiconductors are cheap and abundant
	a semiconductor conducts current better than a conductor

Solution

A semiconductor is a material that has a limited ability to conduct electrical current with conductivity between that of an insulator and that of a conductor. Silicon, a cheap and abundant material, is the most used semiconductor material although other materials are used in the electronics components made from semiconductors. The primary advantages of a semiconductor over a conductor is that the conductivity of a semiconductor can be varied under an external electrical field giving engineers precise control over complex circuits and, unlike conductors like metals, a semiconductor's conductivity increases with increased temperatures.