ASVAB Electronics Information Practice Test 478429 Results

Your Results Global Average
Questions 5 5
Correct 0 3.17
Score 0% 63%

Review

1

Which of the following converts electrical energy into another form of energy in an electrical circuit?

61% Answer Correctly

load

DC source

AC source

wiring


Solution

A load is a source of resistance that converts electrical energy into another form of energy. The components of a microwave, for example, are loads that work together to convert household electricity into radation that can be used to quickly cook food.


2

Which of the following allows DC to pass easily but resists the flow of AC?

56% Answer Correctly

semiconductor

transformer

inductor

capacitor


Solution

An inductor is coiled wire that stores electric energy in the form of magnetic energy and resists changes in the electric current flowing through it. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC.


3 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 665 volts and current is 9.5 amps.
81% Answer Correctly
70 Ω
23 Ω
71.5 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 = \( \frac{V}{I} \) = \( \frac{665}{9.5} \) = 70 Ω


4

Capacitors store:

69% Answer Correctly

electricity

resistance

capacitance

current


Solution

Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.


5 How would you connect 6 [6V 15A] batteries to achieve a combined power output of 6V 90A?
51% Answer Correctly
perpendicular
series
series-parallel
parallel

Solution

Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 36V 15A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 6V 90A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 18V 45A configuration.