Ultimate Quiz On Basic Electronics Knowledge
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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.
Farad
- 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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