ASVAB Electronics Information Practice Test 794044 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.41
Score	0%	68%

Review

The valence shell of n insulator is how full of electrons?

56% Answer Correctly

	less than half full
	more than half full
	empty
	half full

Solution

Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.

2 A circuit with a 120-volt power supply is protected by a 25-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

85% Answer Correctly

	2700 W
	3000 W
	3300 W
	2992 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 25A circuit breaker would allow is 120V x 25A = 3000 W.

Which of the following will increase the magnetic field produced by the electric current in a wire?

68% Answer Correctly

	construct the wire from conductive material
	wind the wire into a coil
	construct the wire from insulative material
	wrap the wire around a ceramic core

Solution

A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.

This circuit component symbol represents a(n):

67% Answer Correctly

	transformer
	transistor
	diode
	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.

This circuit diagram represents a(n):

65% Answer Correctly

	rectifier
	series-parallel circuit
	series circuit
	parallel circuit

Solution

In a parallel circuit, each load occupies a separate parallel path in the circuit and the input voltage is fully applied to each path. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present.