ASVAB Electronics Information Practice Test 435515 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.30
Score	0%	66%

Review

Which of the following is not a characteristic of direct current?

47% Answer Correctly

	used to power your cell phone
	cannot easily travel distances without power loss
	electrons flow in only one consistent direction
	an example power source is a generator

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of DC is a battery. 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.

Why does current in an electric circuit create heat?

77% Answer Correctly

	the wire in the circuit burns when current passes through
	current is naturally hot
	voltage is naturally hot
	heat is created when the current overcomes resistance in the wire

Solution

Current in an electric circuit creates heat when the current overcomes resistance in the wire.

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

67% Answer Correctly

	highway
	one-way street
	parking lot
	traffic light

Solution

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

The voltage output of a transformer primarily depends on which of the following?

57% Answer Correctly

	the conductor used for the wire in the coils
	the diameter of the coils
	the diameter of the wire in the coils
	the number of turns in the wire of the coils

Solution

A transformer utilizes an inductor to increase or decrease the voltage in a circuit. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil.

What type of current flows in only one direction in a circuit?

82% Answer Correctly

	alternating
	direct
	series
	parallel

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.