ASVAB Electronics Information Practice Test 330026 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.07
Score	0%	61%

Review

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

	does nothing to
	increases
	decreases
	eliminates

Solution

All conductors have resistance and the amount of resistance varies with the element. Metals exhibit increased resistance (and, therefore, lower conductivity) as their temperature increases.

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.

What type of current flows in only one direction in a circuit?

82% Answer Correctly

	series
	parallel
	direct
	alternating

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.

4 Suppose you have 4 [15V 5A] batteries that you can connect together in series, in parallel, or in series-parallel. Which of the following voltage and ampere combinations cannot be attained using these 4 batteries?

46% Answer Correctly

	4V 75A
	15V 20A
	60V 5A
	30V 10A

Solution

Connecting the 4 batteries in series multiplies their voltage while keeping their current the same yielding a 60V 5A configuration. Connecting the 4 batteries in parallel multiplies their current while keeping their voltage the same yielding a 15V 20A configuration. Using a series-parallel connection, 2 batteries can be connected in series and 2 can be connected in parallel resulting in a 30V 10A configuration.

This circuit component symbol represents a(n):

57% Answer Correctly

	capacitor
	AC source
	DC source
	transformer

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.