ASVAB Electronics Information Practice Test 891768 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.55
Score	0%	71%

Review

A transistor works by allowing a small amount of current to control general current flow. Where is the small amount of current applied?

55% Answer Correctly

	collector
	emitter
	base
	input

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.

2 Use Ohm's Law to calculate the value of current in this circuit if voltage is 320 volts and resistance is 40 Ω.

81% Answer Correctly

	8 A
	17 A
	1 A
	7.2 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 = \( \frac{V}{R} \) = \( \frac{320}{40} \) = 8 A

You would measure the amount of voltage between two points in a circuit with a(n):

83% Answer Correctly

	voltmeter
	battery
	ammeter
	reostat

Solution

Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.

A capacitor is often used for which of the following purposes?

68% Answer Correctly

	to maintain power in a circuit when the primary power source is disconnected
	to allow a small amount of current to control a large amount of current
	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.

A diode to an electronic circuit is like a _______________ to a city?

67% Answer Correctly

	one-way street
	highway
	traffic light
	parking lot

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction.