ASVAB Electronics Information Practice Test 544809 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.82
Score	0%	76%

Review

1 Use Ohm's Law to calculate the value of current in this circuit if voltage is 150 volts and resistance is 30 Ω.

81% Answer Correctly

	5 A
	12 A
	2.5 A
	15 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 = \( \frac{V}{R} \) = \( \frac{150}{30} \) = 5 A

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.

All electricity is the movement of which subatomic particles?

89% Answer Correctly

	electrons
	neutrons
	protons
	nuclei

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.

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 maintain power in a circuit when the primary power source is disconnected
	to convert alternating current into direct current
	as a primary power source

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.

5 A circuit with a 120-volt power supply is protected by a 10-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	1203 W
	1200 W
	1080 W
	1320 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 10A circuit breaker would allow is 120V x 10A = 1200 W.