ASVAB Electronics Information Practice Test 363299 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.25
Score	0%	65%

Review

A transistor to an electronic circuit is like a _______________ to a house?

68% Answer Correctly

	safe
	no trespassing sign
	driveway
	gate

Solution

A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor. A transistor acts as a gate or switch for electronic signals.

This circuit component symbol represents a(n):

55% Answer Correctly

	transformer
	potentiometer
	inductor
	fuse

Solution

Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.

Which of the following statements about electrical resistance is true?

74% Answer Correctly

	the more resistive the conductor is the faster electron flow will be
	the less resistive the conductor is the slower electron flow will be
	electrically conductive materials have no resistive properties
	the more resistive the conductor is the slower electron flow will be

Solution

Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.

Which of the following is the formula for calculating electrical power?

73% Answer Correctly

	\(P = {I \over V}\)
	P = I²V
	\(P = {V \over I}\)
	P = IV

Solution

Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.

5 How would you connect 6 [9V 25A] batteries to achieve a combined power output of 54V 25A?

53% Answer Correctly

	series
	parallel
	orthogonal
	series-parallel

Solution

Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 54V 25A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 9V 150A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 27V 75A configuration.