ASVAB Electronics Information Practice Test 171942 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.13
Score	0%	63%

Review

Alternating current changes __________ many times each second.

72% Answer Correctly

	resistance
	frequency
	direction
	period

Solution

In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.

Which of the following is not a purpose of a resistor in an electrical circuit?

70% Answer Correctly

	moderate the heat in the circuit
	limit the current in the circuit
	multiply the current in the circuit
	control the voltage in the circuit

Solution

Resistors can be chosen in a wide variety of values to control the voltage in a circuit, limit the current, or moderate the heat produced by the components in the circuit.

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

56% Answer Correctly

	more than half full
	half full
	empty
	less than 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.

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

	eliminates
	increases
	decreases
	does nothing to

Solution

All conductors have resistance and the amount of resistance varies with the element. Metals exhibit increased resistance (and, therefore, lower conductivity) as their temperature increases.

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

67% Answer Correctly

	one-way street
	parking lot
	highway
	traffic light

Solution

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