ASVAB Electronics Information Practice Test 43643 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.32
Score	0%	66%

Review

A __________ electric current produces a magnetic field proportional to the amount of current flow.

61% Answer Correctly

	moving
	high voltage
	stationary
	low voltage

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.

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

82% Answer Correctly

	alternating
	series
	direct
	parallel

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.

3 Suppose you have 10 [15V 15A] 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 10 batteries?

46% Answer Correctly

	15V 150A
	75V 75A
	300V 300A
	150V 15A

Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 150V 15A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yielding a 15V 150A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 75V 75A configuration.

Which of the following statements about electrical resistance is true?

75% Answer Correctly

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

A capacitor is often used for which of the following purposes?

68% Answer Correctly

	as a primary power source
	to convert alternating current into direct current
	to maintain power in a circuit when the primary power source is disconnected
	to allow a small amount of current to control a large amount of current

Solution

Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.