ASVAB Electronics Information Practice Test 962980 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.65
Score	0%	73%

Review

1 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

	95 V
	90 V
	91.5 V
	81 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

The volt is a unit of measurement for:

79% Answer Correctly

	capacitance
	current
	power
	voltage

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.

The valence shell of a semiconductor is how full of electrons?

67% Answer Correctly

	empty
	more than half full
	half full
	less than half full

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.

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

67% Answer Correctly

	a schematic
	a blueprint
	a layout
	a matrix

Solution

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

Why is an insulator a poor conductor of electricity?

68% Answer Correctly

	an insulator is made of inorganic material
	an insulator is made of organic material
	an insulator has few free electrons
	an insulator has many free electrons

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.