ASVAB Electronics Information Practice Test 99005 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.74
Score	0%	75%

Review

1 What's the overall power consumption of a piece of equipment that is rated for 2 amps at 110 volts?

80% Answer Correctly

	110 W
	220 W
	660 W
	242 W

Solution

Power is measured in watts (W) and 1 watt equals 1 ampere multiplied by 1 volt: P = \( V \times I \). For this problem, the equipment is rated for 2 amps (I) at 110 volts (V) so the equation becomes P = \( 110 \times 2 \) = 220 W

Why does current in an electric circuit create heat?

77% Answer Correctly

	voltage is naturally hot
	heat is created when the current overcomes resistance in the wire
	current is naturally hot
	the wire in the circuit burns when current passes through

Solution

Current in an electric circuit creates heat when the current overcomes resistance in the wire.

The conductivity of an element depends on how many electrons occupy which electron shell?

78% Answer Correctly

	outer
	middle
	first
	inner

Solution

All electricity is the movement of electrons which are subatomic particles that orbit the nucleus of an atom. Electrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer (valence) electron shell.

4 Use Ohm's Law to calculate the value of current in this circuit if voltage is 100 volts and resistance is 50 Ω.

80% Answer Correctly

	2 A
	1.8 A
	1 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 = \( \frac{V}{R} \) = \( \frac{100}{50} \) = 2 A

Which of the following allows DC to pass easily but resists the flow of AC?

56% Answer Correctly

	transformer
	capacitor
	inductor
	semiconductor

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.