ASVAB Electronics Information Practice Test 659359 Results

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

Review

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

77% Answer Correctly

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

72% Answer Correctly

	transistor
	diode
	capacitor
	inductor

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.

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

85% Answer Correctly

	540 W
	596 W
	603 W
	600 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 5A circuit breaker would allow is 120V x 5A = 600 W.

Electrons will flow as current from areas of __________ potential (concentration of electrons) to areas of __________ potential.

75% Answer Correctly

	low, low
	high, low
	high, high
	low, high

Solution

Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.

The rate of flow of electrons per unit time is which of the following?

74% Answer Correctly

	voltage
	resistance
	conductance
	current

Solution

Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.