ASVAB Electronics Information Practice Test 27013 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.12
Score	0%	62%

Review

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

68% Answer Correctly

	to convert alternating current into direct current
	to maintain power in a circuit when the primary power source is disconnected
	as a primary power source
	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.

Which of the following allows DC to pass easily but resists the flow of AC?

56% Answer Correctly

	semiconductor
	inductor
	transformer
	capacitor

Solution

An inductor is coiled wire that stores electric energy in the form of magnetic energy and resists changes in the electric current flowing through it. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC.

3 How would you connect 10 [9V 10A] batteries to achieve a combined power output of 90V 10A?

53% Answer Correctly

	series
	parallel
	perpendicular
	orthogonal

Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 10A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 9V 100A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 45V 50A configuration.

You would measure the amount of current through a circuit with a(n):

69% Answer Correctly

	ammeter
	battery
	voltmeter
	potentiometer

Solution

Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.

A diode to an electronic circuit is like a _______________ to a city?

67% Answer Correctly

	one-way street
	parking lot
	traffic light
	highway

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction.