ASVAB Electronics Information Practice Test 816000 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.58
Score	0%	72%

Review

Alternating current changes __________ many times each second.

72% Answer Correctly

	resistance
	direction
	period
	frequency

Solution

In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.

2 Use Ohm's Law to calculate the value of current in this circuit if voltage is 240 volts and resistance is 30 Ω.

81% Answer Correctly

	9.5 A
	11 A
	8 A
	12 A

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

Solved for current, I = \( \frac{V}{R} \) = \( \frac{240}{30} \) = 8 A

This circuit component symbol represents a(n):

57% Answer Correctly

	transformer
	DC source
	capacitor
	AC source

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.

A capacitor to an electronic circuit is like a _______________ to a house?

67% Answer Correctly

	storage shed
	driveway
	safe
	gate

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.

The hertz is a unit of measurement for:

81% Answer Correctly

	inductance
	power
	energy
	frequency

Solution

The hertz is a unit of measurement for frequency.