ASVAB Electronics Information Practice Test 260823 Results

Your Results Global Average
Questions 5 5
Correct 0 3.34
Score 0% 67%

Review

1 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 760 volts and current is 9.5 amps.
80% Answer Correctly
72 Ω
80 Ω
40 Ω
73 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 = \( \frac{V}{I} \) = \( \frac{760}{9.5} \) = 80 Ω

2

Resistance and current are __________ proportional.

68% Answer Correctly

directly

exponentially

inversely

not
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.

3

What is the voltage of most household electrical systems in the United States?

59% Answer Correctly

60Hz

220V

110V

60V
Solution

Most households use electricity with a voltage of 110V.

4

This circuit component symbol represents a(n):

55% Answer Correctly

inductor

potentiometer

transformer

fuse
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.

5

This circuit component symbol represents a(n):

72% Answer Correctly

resistor

capacitor

inductor

potentiometer
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.