ASVAB Electronics Information Practice Test 290334 Results

	Your Results	Global Average
Questions	5	5
Correct	0	2.70
Score	0%	54%

Review

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

76% Answer Correctly

	V = IR
	V = I²R
	\(V = {I \over R}\)
	\(V = {R \over I}\)

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

Which of the following is not true about a line drop?

43% Answer Correctly

	it is a decrease in voltage between two points on a line
	it is caused by resistance
	it is addressed by raising current and lowering voltage across the ransmission line
	it is addressed by raising voltage and lowering current across the transmission line

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. A line drop is a decrease in voltage between two points on an electrical transmission line due to resistance in the line. A lower current and higher voltage across the line will help compensate for the line drop.

The diameter of a number 12 wire is __________ the diameter of a number 6 wire?

52% Answer Correctly

	double
	triple
	less than
	more than

Solution

The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.

The valence shell of a conductor is how full of electrons?

52% Answer Correctly

	less than half full
	more than half full
	half full
	full

Solution

Conductors are elements that allow electrons to flow freely. Their valence shell is less than half full of electrons that are able to move easily from one atom to another.

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

48% Answer Correctly

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

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.