ASVAB Electronics Information Practice Test 825942 Results

Your Results Global Average
Questions 5 5
Correct 0 4.02
Score 0% 80%

Review

1

This circuit component symbol represents a(n):

72% Answer Correctly

capacitor

resistor

potentiometer

inductor
Solution

Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance.  Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.

2

The hertz is a unit of measurement for:

81% Answer Correctly

power

energy

inductance

frequency
Solution

The hertz is a unit of measurement for frequency.

3

Resistance is measured in:

86% Answer Correctly

coulombs

ohms

amperes

volts
Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.

4 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 850 volts and current is 8.5 amps.
81% Answer Correctly
150 Ω
100 Ω
101.5 Ω
200 Ω
Solution

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

Solved for resistance, R = \( \frac{V}{I} \) = \( \frac{850}{8.5} \) = 100 Ω

5 Use Ohm's Law to calculate the value of current in this circuit if voltage is 540 volts and resistance is 60 Ω.
82% Answer Correctly
9 A
8 A
9.9 A
12 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 = \( \frac{V}{R} \) = \( \frac{540}{60} \) = 9 A