ASVAB Electronics Information Practice Test 826200 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.72
Score	0%	74%

Review

The formula specifying Ohm's law is which of the following?

77% Answer Correctly

	V = IR
	\(V = {R \over I}\)
	\(V = {I \over R}\)
	V = I²R

Solution

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

This circuit component symbol represents a(n):

66% Answer Correctly

	transformer
	AC source
	DC source
	transistor

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.

The hertz is a unit of measurement for:

81% Answer Correctly

	inductance
	energy
	power
	frequency

Solution

The hertz is a unit of measurement for frequency.

This circuit component symbol represents a(n):

67% Answer Correctly

	transistor
	diode
	transformer
	inductor

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.

5 Use Ohm's Law to calculate the value of current in this circuit if voltage is 480 volts and resistance is 80 Ω.

81% Answer Correctly

	18 A
	9 A
	3 A
	6 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 = \( \frac{V}{R} \) = \( \frac{480}{80} \) = 6 A