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Quiz about Units in Electronics
Quiz about Units in Electronics

Units in Electronics Trivia Quiz


Here are ten of the more important units of measurement used in electricity and electronics. Match the units to the properties.

A matching quiz by mike32768. Estimated time: 3 mins.
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Author
mike32768
Time
3 mins
Type
Match Quiz
Quiz #
401,338
Updated
Dec 03 21
# Qns
10
Difficulty
Easy
Avg Score
8 / 10
Plays
416
Last 3 plays: Guest 98 (6/10), Guest 35 (10/10), aandp1955 (10/10).
(a) Drag-and-drop from the right to the left, or (b) click on a right side answer box and then on a left side box to move it.
QuestionsChoices
1. Resistance  
  Hertz
2. Capacitance  
  Coulomb
3. Inductance  
  Joule
4. Voltage  
  Volt
5. Current  
  Decibel
6. Power  
  Farad
7. Gain (or Loss)  
  Ampere
8. Energy  
  Henry
9. Charge  
  Ohm
10. Frequency  
  Watt





Select each answer

1. Resistance
2. Capacitance
3. Inductance
4. Voltage
5. Current
6. Power
7. Gain (or Loss)
8. Energy
9. Charge
10. Frequency

Most Recent Scores
Oct 04 2024 : Guest 98: 6/10
Oct 04 2024 : Guest 35: 10/10
Oct 04 2024 : aandp1955: 10/10
Oct 04 2024 : Guest 49: 10/10
Oct 04 2024 : Guest 12: 10/10
Sep 15 2024 : psnz: 10/10

Quiz Answer Key and Fun Facts
1. Resistance

Answer: Ohm

Although the Greek letter omega, Ω, is used as its symbol, the unit itself is named after German physicist Georg Simon Ohm (1789-1854). Ohm found a proportionality between the voltage applied across a conductor and the resulting electric current. This relationship is known as Ohm's law (V=I*R), perhaps the most important and well-known relationship in electronics.
2. Capacitance

Answer: Farad

Capacitance is the ability to store an electrical charge. The farad is named after the English physicist Michael Faraday (1791-1867) who worked with magnetism and chemistry. The actual values in a practical circuit are typically much smaller than a farad. For example, microfarads (10^-6 farad) and picofarads (10^-12 farad) are much more common.
3. Inductance

Answer: Henry

The henry is named after Joseph Henry (1797-1878), an American scientist who served as the first Secretary of the Smithsonian. The letter "L" is used to identify an inductor in a circuit diagram in honor of the physicist Heinrich Lenz. One henry is the amount of inductance that causes a voltage of one volt, when the current is changing at a rate of one ampere per second.
4. Voltage

Answer: Volt

No, the volt is not named after Voltaire (the French philosopher) but much more fittingly, after Alessandro Volta (1745-1827), the Italian physicist and inventor of the electric battery.
5. Current

Answer: Ampere

Electric current is the flow of electric charge. The ampere (often shortened to "amp"), is the base unit of current and named after French mathematician and physicist, Andre-Marie Ampere (1775-1836).
6. Power

Answer: Watt

The unit for power is the watt, named after Scottish inventor James Watt (1736-1819) who greatly improved upon the steam engine which was fundamental in the Industrial Revolution.
7. Gain (or Loss)

Answer: Decibel

The unit, bel, is named after Alexander Graham Bell (1847-1922), the Scottish-American inventor. Since the bel is a rather large ratio, the decibel, one-tenth of a bel, is far more commonly used. The decibel (or bel) is actually a ratio and can be used to specify, for example, the power gain of an amplifier, or the power loss in a cable.
8. Energy

Answer: Joule

Energy is the amount of power provided for a time period. Homeowners in the US would measure their energy use in kilowatt-hours (kWh)- that's 1000 watts of power (say, ten, 100W light bulbs) for one hour. The joule, however, is less commonly used, outside of engineering at least, and is named after English physicist James Prescott Joule (1818-1889).

It is defined as the heat energy of one ampere passing through one ohm for one second. One kWh equals 3.6x10^6 joules. The joule is also used in mechanical engineering defined as the energy of one newton acting on an object through a distance of one meter (or 1 newton-meter or Nm).
9. Charge

Answer: Coulomb

Less commonly used, perhaps, than the other units in this quiz, the coulomb is named after French physicist Charles-Augustin de Coulomb (1736-1806). An electron, for example, has a charge of -1.6*10^-19 coulombs. An ampere is one coulomb of charge per second flowing in a cable, so that's 6.25 million million million electrons per second.
10. Frequency

Answer: Hertz

Historically called "cycles per second", the unit of frequency was renamed during the early 20th century in honor of Heinrich Hertz (1857-1894), a German physicist who proved the existence of the electromagnetic waves that had been predicted earlier by James Maxwell.
Source: Author mike32768

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