ASVAB Electronics Information Practice Test 758933 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.50
Score	0%	70%

Review

This circuit component symbol represents a(n):

60% Answer Correctly

	transformer
	resistor
	inductor
	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.

The hertz is a unit of measurement for:

81% Answer Correctly

	power
	inductance
	energy
	frequency

Solution

The hertz is a unit of measurement for frequency.

3 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 30 Ω and current is 9.5 amps.

85% Answer Correctly

	855 V
	256.5 V
	285 V
	280 V

Solution

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

V = \( I \times R \) = \( 9.5 \times 30 \) = 285 V

What is the voltage of most household electrical systems in the United States?

59% Answer Correctly

	220V
	110V
	60Hz
	60V

Solution

Most households use electricity with a voltage of 110V.

This circuit component symbol represents a(n):

65% Answer Correctly

	DC source
	transformer
	transistor
	AC source

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.