Electronics Asvab 2025/2026

Which device limits current flow to a single direction?

A- Capacitor

B-Transformer

C-Resistor

D-Diode

D-Diode

Semiconductors that convert electrical current into light are:

A- CFL

B-LED

C-Fluorescent

D-Incandescent

B-LED

When current flow is interrupted by a blown fuse, the circuit becomes?

A- Open

B-Closed

C-Parallel

D-Shorted

A- Open

Silicon chips are used primarily in

A- Relays

B-integrated circuits

C-motors

D-Transformers

B-Integrated circuits

A standard multimeter does NOT measure:

A- Voltage

B-Current

C-Frequency

D-resistance

C-Frequency

To make permanent electronic connections, use a:

A- Soldering iron

B-Multimeter

C-Splice Connector

D-Electrical Tape

A- Soldering iron

The part that revolves in the motor of a generator is called the:

A- Shaft

B-Brush Assembly

C-Armature

D-Bearing

C- Armature

In order to make an electric current flow, it is necessary to have:

A- Copper conductors

B-An ammeter

C-Difference of potential

D-Open circuit

C- Difference of potential

The symbol for a transformer

Transformer

Power lines carry what type of current:

A- Alternating

B-Direct

C-Transforming

D-Limited

A- Alternating Current

What does AC stand for

alternating current

What is the type of resistance in an AC transmitter circuit?

A- Static

B-Impedance

C-Frequency

D-Capacitance

B-Impedance

When wire conductors are coated with solder, the process is called?

A- Brazing

B-Merging

C-Fusing

D-Tinning

D-Tinning

Which of the following CANNOT be used to store an electrical charge:

A- Fuse

B-Dielectric

C-Capacitor

D-Battery

A-Fuse

When measuring resistance with an ohmmeter you should?

A- Connect the power

B-Insulate the probes

C-Disconnect the power

D-Measure polarity

C-Disconnect the power

Which of the following best carries electric current?

A- Transformer

B-Conductor

C-Switches

D-Resistor

B-Conductor

Which metal is commonly used as a conductor?

A- Aluminum

B-Copper

C-Chromium

D-Lead

B-copper

Which of the following converts light energy into electrical energy?

A- Radio

B-radar

C-stereo speaker

D-photoelectric cell

D-photoelectric cell

A neon bulb emits light because:

A- The current flows through neon gas

B-The glass is blue

C-The gas is blue

D-The filament in the bulb gets hot

A-The current flows through neon gas

Another name for a transistor is a:

A- Integrated circuit

B-Semiconductor

C-Transfer Resistor

D-Connector

B-Semiconductor

The property of a circuit that opposes the flow of electrons is :

A- Reactance

B-Capacitance

C-Resistance

D-Inductance

C-Resistance

What is an amplifier?

A- A device that makes audio signals stronger

B-A device that increases signal strength

C-A device that increases amperage.

D-A devices that improves sound fidelity

B-A device that increases signal strength

A current that changes its polarity many times per second is:

A- Direct

B-Reciprocating

C-Alternating

D-Transitory

C-Alternating

In what kind of circuit does electrical current flow from one component directly to the next component?

A- Open

B-Parallel

C-Series

D-Sequential

C-series

Which device lowers current flow in a circuit?

A- capacitor

B-Transformer

C-resistor

D-diode

c-resistor

A 220v circuit has a resistance of 10Ohms. How much current is present in the circuit?

A- 2 amps

B-20 amps

C-22 amps

D-40 amps

c-22

V = I * R

v= volt

I = current(amps)

R = Resistance(ohm's)

A 120V circuit has a resistance of 20ohms. How much current is present in the circuit?

A- .5amps

B-3 amps

C-6 amps

D-9 amps

c- 6 amps

v = I * R

If a series circuit has resistance of 22 ohms and a current of 5 amps, how much voltage is currently in the circuit?

A- 75V

B-100v

C-110v

D-220v

C-110

V = I * R

In this Schematic of a parallel circuit if R1 is 50 and R2 is 50, what is the total resistance?

A- 25ohms

B-50ohms

C-100 ohms

D-1,000ohms

A - 25 ohms

Rt= 1/1/r1+ 1/r2

In this schematic, the total resistance is ( r1 and r2 is 100)

A- 50ohms

B-100ohms

C-1,000ohms

D-10, 000ohms

A - 50

Which of the following allows the telecommunication industry to transmit the greatest volume of data at the fastest speed?

A- copper wire

B-Optical fiber

C-Wireless router

D-Aluminum wire

B-optical fiber

Picture of resistor

The phrase "open circuit" means:

A- Loose wires

B-Disconnected

C-Fully charged

D-Current can flow free

B-disconnected

In a closed circuit, when a short power cord is replaced with a long power cord, which of the following increases?

A- Voltage

B-Insulation

C-Resistance

D-Conductivity

C-resistance

A switch starts or stops the flow of electric current in a circuit by means of its:

A- Probes

B-Contacts

C-Resistors

D-Insulators

B-contacts

The multiple position on a wire stripper are required for:

A- various gauge wires

B-electrical code variations

C-people with different size hands

D-Different sizes of wire connectors

A- various gauge wires

Which part of a television is the output device?

A- Channel switch button

B-Volume control button

C-Antenna

D-Screen

D- screen

In the circuit shown in the illustration, the battery illuminates a lamp and sounds a horn. Opening switch 2 will:

A- Short out both the horn and the lamp

B-Activate the horn and turn off the lamp

C-Silence the horn and leave the lamp on

D-Alternate power between the lamp and the horn

C- silence the horn and leave the lamp on

When an outlet is grounded, it is connected to:

A- An appliance

B-A cold wire

C-A red wire

D-The earth

D- the earth

A computer's microprocessor is actually

A- A USB port

B-A serial port

C-A vacuum tube

D- An integrated circuit

D- An integrated circuit

Which of the following components is found in a simple electromagnet?

A- Coil of wire

B-transistor array

C-Fiber optic bundle

D-Bank of capacitors

A-coil of wire

Which of these is an example of an electrostatic discharge?

A- A lightning bolt strikes a tall building

B-A battery stops producing electricity

C-An outdoor porch light is turned off

D-A match is struck against a rock

A - A lightning bolt strikes a tall building

When someone says an appliance is "hard-wired" it usually means the appliance is:

A- Plugged into a four-plug outlet

B-Wired directly into the house wiring

C-Plugged into a ground-fault interrupter switch

D-Connected by a surge protector to the house wiring

B-wired directly into the house wiring

If the resistance is 100 ohms and the current is 0.1 amperes in this circuit diagram, the the voltage is:

A- 5v

B-10v

C-100v

D-1,000v

b-10v

What is the current in a series circuit which have 15ohms, 5 ohms and 20 ohms and the volt is 120v

A- 2amps

B-3 amps

C-4 amps

D-5 amps

B-3 amps

total resistance = 15 + 20 + 5= 40

then V = I * R

In this schematic of a parallel circuit , if r1 is 50 and r2 is 50, what is the total resistance?

A- 25ohms

B-50 ohms

C-100ohms

D-1,000ohms

A - 25ohms

What is the total resistance in this circuit series(85 and 175 ohms) and parallel 150 and 100 ohms and 80v?

A- 85ohms

B-510ohms

C-320ohms

D-260ohms

C- 320ohms

first calculate parallel circuit that's gonna be = 60 and then series circuit that's gonna be = 85 + 60 + 175 = 320

Which of the following equations is not an accurate representation of ohm's law?

A- V = I * R

B- I= V/R

C- R = V/I

D- I = V * R

D- I = V * R

Which of the following is the correct formula to determine electric power in watts?

A- P= I * V

B- P = 2I * V

C- P = 2V * I

D-p = 2I * V

A - P = I * V

To measure electrical power, you would use an:

A- ammeter(amp)

B-ohmmeter(resistance)

C- voltmeter(volts)

D- wattmeter

D- wattmeter

Which of the following has the least resistance?

A- iron

B-rubber

C-copper

D-wood

C-copper

If each resistor in this circuit equals 1,000 ohms, what is the total resistance in this circuit? (4 resistor)

A- 250ohms

B-500ohms

C-1,000ohms

D-4, 000ohms

A - 250 ohms use parallel formula

Changing AC to DC is called what?

A- capacitance

B-impedance

C-rectification

D-induction

C- rectification

A number -12 wire compared to a number 6 wire:

A- is longer

B- is shorter

C-is smaller in diameter

D- is larger in diameter

D- is smaller in diameter

If 2 volts of battery power is used to power a flashlight that draws 1 amp of current, how much power does the flashlight use?

A- .5W

B-2W

C-4W

D-16W

B- 2W

P = I * V

The symbol of fuse

How many paths of electrical flow can be found in a series circuit?

A- one

B-two

C-two or more

D-it can't be determined form the information given.

A - one

The ground wire is always :

A- green

B-black

C-whitish

D-blue

A - green

Silver is a better conductor than copper. But copper is more often used because of:

the cost of silver

If a circuit has a 9v battery and a 3ohms resistor, what is the power output of the battery?

A- 27w

B-243w

C-81w

D-6w

A - 27

To find the answer we have to use the P = I V but we need current so first we need to use ohms law v = I R

What is the total current in this circuit? it's series circuit and there two resistor 20 and 40 ohms and the volt is 60.

A- .5amps

B-1 amps

C-30amps

D-100amps

B - 1amps

find find the rt for series circuit that's rt= 20 + 40 = 60 then use ohms law V = I * R

Current can be expressed in

A- kiloohms

B-kilovolts

C-milliamperes

D-millivolts

c- milliamperes

Which of the following is one of the reasons neighborhoods are connected to the power grid via electrical substations instead of being wired into long-distance power lines directly?

A- The substation use special components to connect aluminum power line to copper household wiring.

B-the substation transformer direct current to alternating current for household use

C-the substation transformer alternating current to direct current for household use

D-The substation transforms the efficient high-voltage power coming off the lines to a safe, lower value for household use.

D-The substation transforms the efficient high-voltage power coming off the lines to a safe, lower value for household use.

When graphed over time, household alternating current (AC) takes on a distinct shape called a:

A- Sine wave

B-Pulse Wave

C-Sawtooth wave

D-Triangular wave

A- sine wave

Which of the following correctly list the subatomic particles in an atom?

A- Protons carry no charge in the nucleus, neutrons carry negative charge in the nucleus, and electrons surround the nucleus in a cloud and carry a positive charge.

B- Protons carry positive charge in the nucleus, neutrons have no charge in the nucleus, and electrons have a negative charge and are found in cloud surrounding the nucleus.

C-Protons carry positive charge in the nucleus, electrons have negative charge in the nucleus, and neutrons have a negative charge and cloud surround the nucleus in a cloud.

D-Protons carry positive charge, and they surround the nucleus in the cloud. The nucleus contains negatively charged electrons and neutrons, which carry no charge.

B- Protons carry positive charge in the nucleus, neutrons have no charge in the nucleus, and electrons have a negative charge and are found in cloud surrounding the nucleus.

What property of metals lends them to be conductive materials?

A-The protons in the outer shells are free to drift between atoms.

B-The electrons in the outer shells are free to drift between atoms.

C-The electrons in the outer shell are pulled in tightly by the nucleus so they do not drift away to surrounding atoms.

D-The neutrons in the outer shell are pulled in tightly by the nucleus so they do not drift away to surrounding atoms

B- The electrons in the outer shells are free to drift between atoms.

How many three-way switches would you use to control a hallway light from both ends of the hallway?

A-1

B-2

C-3

D-4

B-2

Which of these devices contains an electromagnet?

A-Light bulb

B-battery

C-Flashlight

D-Doorbell

A battery makes what kind of current?

A-indirect

B-Alternating

C-direct

D-pulsing

C-direct

Rapid and interrupted current that changes direction 60 times per second is known as:

A-direct current

B-nonconductor current

C-alternating current

D-erratic current

C-alternating current

In which kind of circuit is current always the same at all points?

A-parallel

B-Series

C-integrated

D-open

B-series

In a series circuit, a switch controls:

A-no devices on the circuit

B-one device on a circuit

C-two devices on a circuit

D-All devices on a circuit

D-All devices on a circuit

If 3 volts of battery power is used to power a flashlight that draws 5 amps of current, how much power does the flashlight use?

A-0.6w

B-1.67w

C-15w

D-75w

C-15

P = I * V

If a 30watt light bulb is operated at 120v, how much current does it draw?

A-0.25amps

B-2.5amps

C-25.0amps

D-3,600amps

A-0.25amps

If a computer uses 300w of power and operates for 10hours, how many kilowatt-hours of energy does it consume?

A-3kwh

B-30kwh

C-300kwh

D-0.3kwh

A-3khw

1000w-1khw

300*10=3000

3000/1000= 3khw

If an extension cord has a smaller gauge than is required by the appliance, it:

A-may heat up and cause a fire

B-will have no effect

C-shut itself off

D-not let the appliance turn on

A- may heat up and cause a fire

When an outlet draws more amps than it is rated to handle:

A-there is no risk of fire.

B-the outlet closes the circuit

C-the outlet turns off the power

D-The breaker for the circuit trips.

D- The breaker for the circuit trips

The capacity of a household electric circuit is commonly measured in units that describe its ability to deliver:

A-current

B-voltage

C-resistance

D-watts

A-current

A circuit breaker is a type of electrical:

A-ground

B-transformer

C-switch

D-resistor

C-switch

Ohm's law states that : V = I x R. If V stays the same, then an increase in R would cause I to:

A-increase

B-decrease

C-not change

D-not enough information

B-Decrease

The color stripes on a resistor indicate the resistor's :

A-volts

B-value

C-watts

D-current

B-Value

What tool is used to remove a module from an electronic assembly?

A-chip puller

B-wire gauge

C-wire stripper

D-hydrometer

A- chip puller

Home outlets are connected to a panel box with separate circuits. These outlets are connected in:

A-series

B-parallel

C-polarity

D-combination

B-parallel

A variable resistor is commonly used to:

A-Prevent a circuit overload.

B-Start an automobile engine.

C-Adjust the volume of a radio

D-Turn a heater to a specific

C- Adjust the volume of a radio

what are the different band color and digit on a resistor.

yellow - 4

blue - 6

gray - 8

white - 9

Electricity

General term for the variety of phenomena resulting from the presence and flow of electric current

Volts

Amperes (amps)

Ohms

3 ways Electricity is measured

Volts

Measure the difference of potential between 2 points

Amperes (amps)

Measure the number of electrons that move past a specific point in 1 second

(i.e. electrical currents)

Ohms

Measure resistance, including anything that could limit the flow of electrons

Current

Electrical ___ occurs when electrons move from one place to another.

Conductors

(e.g. copper, silver, water)

A substance, body, or device that conducts electricity; allows the electrons to move freely.

Insulators

(e.g. rubber, wood)

A material of such low conductivity that does not easily allow the flow of electrical current to pass through it; discourages electrical current

Watt

This measures power, the rate at which electrical energy is consumed or transformed into another type of energy, such as light or heat

Power

The rate at which electrical energy is consumed or transformed into another type of energy, such as light or heat

Watt-hour

This is the amount of energy used in 1 hour at a rate of 1 watt.

Kilowatt-hour

The amount of energy used in 1 hour at a rate of 1,000 watts(i.e.1-kilowatt)

True

True or False

Most electricity is measured in kilowatt-hours

Wattage x Time (expressed in hours)

To find watt-hours multiply ___ by ___.

10 kilowatt-hours

How many kilowatt-hours is enough energy to run a 10,000-watt speaker system for 1 hour?