ASVAB Electronics Information Practice Test 28846 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.13
Score	0%	63%

Review

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

83% Answer Correctly

	battery
	voltmeter
	ammeter
	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.

This circuit component symbol represents a(n):

55% Answer Correctly

	inductor
	potentiometer
	transformer
	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.

What is the frequency of most household electrical systems?

60% Answer Correctly

	60Hz
	110V
	60MHz
	110Hz

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. Most households use electricity with a frequency of 60Hz.

Capacitors connected in series produce __________ capacitance compared to capacitors connected in parallel.

45% Answer Correctly

	less
	no
	more
	the same

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 connected in series produce less capacitance than capacitors connected in parallel.

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

68% Answer Correctly

	to allow a small amount of current to control a large amount of current
	to convert alternating current into direct 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.