# Ultimate Quiz On Basic Electronics Knowledge

29 Questions | Total Attempts: 4098  Settings  The study of electronics changes day by day as the technology concerned with transistors and microchips changes. One takes up electronics to understand how electrons move in a conductor, semiconductors, vacuum or gas. Take up the ultimate quiz on basic electronics knowledge and see how far wide your knowledge extends. All the best!

• 1.
Is it possible that 48V phantom power can damage a balanced, dynamic Mic?
• A.

Yes, it damages the voice coil

• B.

Yes, it burns out the output transformer

• C.

No, it just results in a low level hum noise, as phantom power has a frequency of 60 hz

• D.

No, as the same potential is applied to both leads of the voice coil

• E.

Yes, if the mic is plugged in while the power is on

• 2.
In what type of circuit is the total resistance smaller than the smallest resistance?
• A.

Serial circuits of resistors

• B.

Parallel circuits of resistors

• C.

Parallel circuits of capacitors

• D.

Serial circuits of inductors

• E.

Parallel circuits of diodes

• 3.
What is the difference between potential and voltage?
• A.

No difference

• B.

The voltage is the product of the two potentials

• C.

The voltage is the sum of two potentials

• D.

The voltage is the difference of two potentials

• 4.
For which of the following wave forms is this statement true: VRMS = Vpeak
• A.

Sine

• B.

Square

• C.

Triangle

• D.

Ramp

• E.

Sawtooth

• 5.
What is the direction of the current flow (electron flow) in a closed DC circuit?
• A.

From the more positive to the more negative potential

• B.

From the more negative to the more positive potential

• C.

It depends on the components in the circuit

• D.

It alternates back and forth from negative to positive

• E.

None of the above

• 6.
Charge in motion is called...
• A.

Retentivity

• B.

Conductance

• C.

Flux

• D.

Resistance

• E.

Current

• 7.
The unit of potential difference is the
• A.

• B.

Watt

• C.

Siemens

• D.

Volt

• E.

Ampere

• 8.
Suppose you double the voltage in a simple DC circuit, and cut the resistance in half. The current will become
• A.

Half as great

• B.

Twice as great

• C.

The same as it was before

• D.

Eight times as great

• E.

Four times as great

• 9.
The DC voltage in a circuit is 550mV and the current is 7.2mA. What is the resistance?
• A.

0.76 ohms

• B.

76 ohms

• C.

0.0040 ohms

• D.

39.6 ohms

• E.

42 ohms

• 10.
A material that has extremely high electrical resistance is known as
• A.

A semiconductor

• B.

A paraconductor

• C.

A resistor

• D.

An insulator

• E.

A diamagnetic substance

• 11.
The length of time between a point in one cycle and the same point in the next cycle of an AC wave is the
• A.

Frequency

• B.

Magnitude

• C.

Amplitude

• D.

Period

• E.

Peak to peak value

• 12.
A capacitor stores electrical energy as
• A.

Current

• B.

Voltage

• C.

A magnetic field

• D.

An electric field

• E.

None of the above

• 13.
A series circuit has 7 ohm, 9 ohm, and 10 ohm resistors; what is its total resistance?
• A.

26 ohms

• B.

6 ohms

• C.

23.9 ohms

• D.

22 ohms

• E.

5.3 ohms

• 14.
What is current in a circuit with a potential difference of 240V and a resistance of 75 ohms?
• A.

3.0 A

• B.

3.5 A

• C.

2.8 A

• D.

3.4A

• E.

3.2A

• 15.
When electrical current flows in a DC circuit, it flows from
• A.

Positive to negative

• B.

The switch to the resistor

• C.

The inductor to the capacitor

• D.

Negative to positive

• E.

Left to right

• 16.
A parallel circuit consists of four 16 ohm resistors. What is the total resistance?
• A.

32 ohms

• B.

64 ohms

• C.

2 ohms

• D.

4 ohms

• E.

8 ohms

• 17.
A variable resistor that adjusts voltages in a circuit is
• A.

A capacitor

• B.

A flux capacitor

• C.

A potentiometer

• D.

An inductor

• E.

A transformer

• 18.
What is the total resistance in a parallel DC circuit with resistors valued at 12 ohms, 6 ohms, and 4 ohms?
• A.

2 ohms

• B.

3 ohms

• C.

4 ohms

• D.

5 ohms

• E.

6 ohm

• 19.
How many amps does a 100 watt light bulb draw when connected to a 117V supply
• A.

.5 A

• B.

417 mA

• C.

110 V

• D.

1.2 A

• E.

855 mA

• 20.
If a material has a low resistance,
• A.

It is a good conductor

• B.

It is a poor conductor

• C.

The current flows mainly in the form of holes

• D.

Current can only flow in one direction

• E.

It is a semiconductor

• 21.
A balanced line must have
• A.

One conductor and a shield

• B.

Two shields and two conductors

• C.

Two conductors and a shield

• D.

Two shields and a conductor

• E.

None of the above

• 22.
The rate at which electrons (charge carriers) flow is measured in
• A.

Amperes

• B.

Coulombs

• C.

Volts

• D.

Watts

• E.

Watt hours

• 23.
A component in an electrical circuit which can store energy but will not allow D/C current to flow is
• A.

A resistor

• B.

An impedance

• C.

A transformer

• D.

A capacitor

• E.

An inductor

• 24.
In electrical circuits, what is a passive device?
• A.

A device that requires an external power source to operate

• B.

A device that does NOT require an external power source

• C.

A device that is lazy and really serves no purpose at all

• D.

A device that requires a capacitator

• 25.
If Power equals Current times Voltage (P = l x V) then how do you find the Current if you know the Power and Voltage
• A.

Divide both sides by the power

• B.

Multiply both sides by the current

• C.

Multiply both sides by the voltage

• D.

Divide both sides by the voltage

• E.

You can't derive the Current from this formula

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