ASVAB Electronics Information Practice Test 754356 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.36
Score	0%	67%

Review

General current flow in a transistor is from __________ to __________.

50% Answer Correctly

	collector, emitter
	base, collector
	collector, base
	base, emitter

Solution

The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. 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.

You would measure the amount of voltage between two points in a circuit with a(n):

83% Answer Correctly

	ammeter
	battery
	voltmeter
	reostat

Solution

Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.

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

67% Answer Correctly

	a matrix
	a schematic
	a blueprint
	a layout

Solution

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

4 How would you connect 10 [9V 5A] batteries to achieve a combined power output of 45V 25A?

67% Answer Correctly

	series-parallel
	perpendicular
	series
	orthogonal

Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 5A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 9V 50A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 45V 25A configuration.

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

68% Answer Correctly

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

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.