ASVAB Electronics Information Practice Test 839419 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.50
Score	0%	70%

Review

A __________ electric current produces a magnetic field proportional to the amount of current flow.

61% Answer Correctly

	moving
	stationary
	high voltage
	low voltage

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.

2 Suppose you have 8 [6V 20A] batteries that you can connect together in series, in parallel, or in series-parallel. Which of the following voltage and ampere combinations cannot be attained using these 8 batteries?

46% Answer Correctly

	6V 160A
	48V 160A
	48V 20A
	24V 80A

Solution

Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 48V 20A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 160A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 24V 80A configuration.

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

76% Answer Correctly

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

Solution

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

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

82% Answer Correctly

	direct
	parallel
	series
	alternating

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.

5 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 80 Ω and current is 9.5 amps.

85% Answer Correctly

	380 V
	253.33 V
	684 V
	760 V

Solution

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

V = \( I \times R \) = \( 9.5 \times 80 \) = 760 V