ASVAB Electrical Fundamentals Practice Quiz

One coulomb per second is the measurement unit of electric current, which is known as an ampere. Ohm, watt, and volt are also units of measurement in electricity, but they do not represent the rate of flow of electric charge like ampere does.

The correct unit of electrical resistance is Ohm, denoted by the symbol Ω. It is named after the German physicist Georg Simon Ohm.

The electrical unit of pressure is measured in volts, not amperes, ohms, or watts.

Currents primarily exhibit the heating effect, magnetic effect, and chemical effect. Other effects such as sound, gravity, and light are not directly associated with electrical currents.

FM radio broadcasts typically operate within the frequency range of 88MHz to 108 MHz, allowing for the transmission of music, news, and other content.

A resistor is a passive two-terminal electrical component that limits the flow of electric current in a circuit. It is commonly used to set or adjust the level of current in a circuit.

Running an extension cord along a baseboard is the safest way as it reduces tripping hazards and potential damage to the cord. Crossing a doorway can also pose a tripping hazard, placing it under a rug can cause overheating, and running it through a window can damage the cord and create a safety hazard.

AC stands for Alternating Current, which is a type of electrical current where the flow of electric charge periodically reverses direction.

Silver is the best conductor of electricity among the given options, and as a result, it has the least resistance. Rubber, Wood, and Iron are poor conductors of electricity, hence they exhibit higher resistance compared to Silver.

Flux is used in soldering to prevent oxidation, not to speed up the process, improve conductivity, or add color.

Current is specifically the movement of electrons in a circuit, making the flow of protons, neutrons, and photons incorrect choices.

A dynamo specifically refers to machines that convert energy through electromagnetic induction, whereas transformers, generators, and motors may have different operating principles or functions.

When calculating current (I) using Ohm's Law (V = IR), where V is voltage and R is resistance, we get I = V / R. Substituting the given values, we get I = 45 V / 15 ohms = 3 A.

The symbol '.' typically represents a BST Transistor in electrical circuit diagrams, not a resistor, capacitor, or inductor.

Farads are units of resistance generally associated with capacitors. A farad is a unit of capacitance.

Kirchoff's Law of current states that the algebraic sum of currents at any node in a circuit is always zero, meaning the sum of currents entering the node is equal to the sum of currents leaving the node.

When alternating current passes through a diode, it only conducts during the positive half cycle while blocking the negative half cycle, resulting in a rectified output.

The maximum wattage that a 20-ampere circuit breaker can handle without tripping is 2400 watts, so 1800 watts, 2100 watts, and 2500 watts would exceed the limit and cause the circuit to trip.

When capacitors are connected in parallel, their capacitances add up to give the total capacitance of the circuit.

All carbon composition resistors are color-coded to indicate their resistances in ohms. Each color band stands for a digit. Generally, four bands indicate the value of a resistor. The fourth band indicates the tolerance of the resistor. The silver band represents the tolerance of ± 10%. The gold band represents a tolerance of ± 5%. The absence of a color tolerance band represents the tolerance of ± 20%. So, choice C is correct.

The common emitter configuration amplifier provides the highest power gain due to its ability to amplify both voltage and current. Common base and common collector configurations excel in voltage gain and current gain respectively, but their overall power gain is lower than that of the common emitter configuration. Common ground is not a valid configuration for amplifier circuits.

A resistor resists or impedes the flow of electrical current in a circuit, thereby controlling the amount of current that flows through the circuit. This is different from increasing voltage, decreasing resistance, or amplifying signal.

Nickel is a good magnetic material due to its high magnetic permeability. Aluminum and Copper are non-magnetic materials, while Wood is also non-magnetic and contains no metallic properties conducive to magnetism.

When current passes through a wire, resistance in the wire causes heating to occur, which is why wires can become warm or hot to the touch.

The correct term for the frequency of current changing direction in a second is Hertz, which measures cycles per second. Ohm, Watt, and Volt are units of electrical resistance, power, and voltage respectively, not related to the frequency of current direction change.

AM radio broadcasts fall within the medium waveband of the electromagnetic spectrum, which ranges from 535 KHz to 1,605 KHz. The incorrect answers provided are actual frequency ranges used for FM radio broadcasts, audio frequencies, and WiFi frequencies, respectively.

In American Wire Gauge (A.W.G.) measurement, the lower the number, the larger the wire diameter and hence, the higher current-carrying capacity. No. 10 being the smallest implies it has a larger diameter compared to No. 4, No. 12, and No. 18 wires.

Rectifiers are circuits specifically designed to convert alternating current (AC) to direct current (DC) by allowing current to flow in only one direction.