ASVAB Electronics Information Practice Test 766833 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.53
Score	0%	71%

Review

You would measure the amount of current through a circuit with a(n):

69% Answer Correctly

	battery
	voltmeter
	potentiometer
	ammeter

Solution

Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.

2 Use Ohm's Law to calculate the value of current in this circuit if voltage is 400 volts and resistance is 50 Ω.

80% Answer Correctly

	24 A
	10 A
	8 A
	16 A

Solution

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

Solved for current, I = \( \frac{V}{R} \) = \( \frac{400}{50} \) = 8 A

This circuit component symbol represents a(n):

70% Answer Correctly

	resistor
	diode
	fuse
	capacitor

Solution

Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.

Which of the following allows encapsulating complex circuit designs for easier integration into electronic devices and machines?

67% Answer Correctly

	series-parallel circuits
	parallel circuits
	integrated circuits
	series circuits

Solution

Circuits containing transistors are packaged into integrated circuit chips that allow encapsulating complex circuit designs (CPU, memory, I/O) for easier integration into electronic devices and machines.

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

67% Answer Correctly

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

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.