ASVAB Electronics Information Practice Test 6174 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.52
Score	0%	70%

Review

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

76% Answer Correctly

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

Solution

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

What is the potential difference in an electrical circuit a measure of?

57% Answer Correctly

	the load at a specific location in the circuit
	the resistance at a specific location in the circuit
	the voltage at a specific location in the circuit
	the current at a specific location in the circuit

Solution

Electrons flow from an area of high concentration to an area of low concentration. A high voltage indicates a high concentration of electrons that creates a greater potential for electron flow than a low voltage. When applied to a load, voltage creates electricity and potential difference is the measure of voltage at a specific location in an electrical circuit.

Which of the following is not a terminal on a transistor?

59% Answer Correctly

	input
	base
	collector
	emitter

Solution

A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.

The watt is a unit of measurement for:

78% Answer Correctly

	resistance
	energy
	frequency
	power

Solution

Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.

5 Use Ohm's Law to calculate the value of current in this circuit if voltage is 225 volts and resistance is 50 Ω.

80% Answer Correctly

	4.95 A
	1.5 A
	4.5 A
	13.5 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 = \( \frac{V}{R} \) = \( \frac{225}{50} \) = 4.5 A