Electronics First Online Short Quiz
Good day BSIT Students! Here is your first online short quiz in Free Elective: Electronics that we have discussed these past few weeks. Before taking this quiz, better study and review first the learning materials that I provided and posted in our classroom. This quiz is only good for 15 minutes. You may also watch this video in order for you to understand the nature and concept of electricity. Good luck and enjoy!
Questions and Answers
- 1.
The legendary story of Benjamin Franklin, the kite, and lightning wouldn't be complete with this object.
- A.
Key
- B.
Shoes
- C.
Drone
- D.
String
Correct Answer
A. KeyExplanation
In the legendary story of Benjamin Franklin and the kite, he used a key as a conductor to attract lightning. The key played a crucial role in completing the electrical circuit and allowing Franklin to demonstrate the connection between lightning and electricity. Without the key, the story would not be complete as it is an essential element in the experiment.Rate this question:
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- 2.
He is credited with inventions such as the first practical incandescent light bulb and the phonograph.
- A.
Guglielmo Marconi
- B.
Thomas Edison
- C.
Luigi Galvani
- D.
Alessandro Volta
Correct Answer
B. Thomas EdisonExplanation
Thomas Edison is credited with inventions such as the first practical incandescent light bulb and the phonograph. He is known for his significant contributions to the field of electrical engineering and is considered one of the greatest inventors in history. Edison's inventions revolutionized the way we live and have had a lasting impact on society.Rate this question:
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- 3.
These kitchen appliances are the most power-hungry in the home.
- A.
Microwave Ovens
- B.
Oven Toasters
- C.
Refrigerators
- D.
Blenders
Correct Answer
C. RefrigeratorsExplanation
Refrigerators are the most power-hungry kitchen appliances because they are constantly running to maintain a cool temperature and keep food fresh. They require a significant amount of electricity to power the compressor, fan, and other components that regulate the temperature inside. On the other hand, microwave ovens, oven toasters, and blenders do not consume as much power as refrigerators since they are used for shorter periods of time and have smaller motors or heating elements.Rate this question:
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- 4.
It is often created when two objects that are not good electrical conductors are rubbed together, and electrons from one of the objects rub off onto the other.
- A.
Magnetism
- B.
Dynamic Electricity
- C.
Static Electricity
- D.
Witricity
Correct Answer
C. Static ElectricityExplanation
Static electricity is often created when two objects that are not good electrical conductors are rubbed together. This rubbing causes electrons from one of the objects to transfer onto the other object, resulting in an imbalance of positive and negative charges. This accumulation of charges creates static electricity.Rate this question:
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- 5.
An electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
- A.
Direct Current
- B.
Alternating Current
- C.
Static Electricity
- D.
Dynamic Electricity
Correct Answer
B. Alternating CurrentExplanation
Alternating current (AC) is the correct answer because it is an electric current that changes direction periodically. It is commonly used in power supplies because it can be easily transformed to different voltages and transmitted over long distances with minimal energy loss. Unlike direct current (DC), which flows in only one direction, AC reverses its direction many times per second, typically at a frequency of 50 or 60 Hz. This characteristic of AC allows for efficient power generation, distribution, and utilization in various electrical devices and systems.Rate this question:
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- 6.
Before the telephone, this was the first communication network that used electricity.
- A.
Light Houses
- B.
Tesla Coils
- C.
Electric Telegraphs
- D.
Radio
Correct Answer
C. Electric TelegraphsExplanation
Before the invention of the telephone, the electric telegraph was the first communication network that utilized electricity. Electric telegraphs allowed messages to be transmitted over long distances through the use of electrical signals. This technology revolutionized communication by enabling faster and more efficient transmission of information compared to traditional methods such as postal mail or messengers. It paved the way for the development of more advanced telecommunication systems, including the telephone.Rate this question:
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- 7.
When you have a material like copper wire that lets electricity flow freely through it, this is what you call it.
- A.
Conductor
- B.
Fuse
- C.
Transformer
- D.
Semiconductor
Correct Answer
A. ConductorExplanation
A material that allows electricity to flow freely through it is called a conductor. Copper wire is a good conductor of electricity due to its high electrical conductivity.Rate this question:
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- 8.
Ideally, electricity can travel at this speed.
- A.
Speed of Clouds
- B.
Speed of Air
- C.
Speed of Sound
- D.
Speed of Light
Correct Answer
D. Speed of LightExplanation
Electricity can travel at the speed of light. This is because electricity is the flow of electrons through a conductor, and electrons move at incredibly high speeds. The speed of light is considered the fastest speed in the universe, traveling at approximately 299,792 kilometers per second in a vacuum. Therefore, it is ideal to say that electricity can travel at the speed of light.Rate this question:
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- 9.
What do you need to transform high voltage to the right voltage for your appliances?
- A.
Transformer
- B.
Fuse
- C.
Circuit Breaker
- D.
Grid Station
Correct Answer
A. TransformerExplanation
A transformer is needed to transform high voltage to the right voltage for appliances. Transformers work by using electromagnetic induction to transfer electrical energy between two or more circuits. They can step up or step down the voltage depending on the needs of the appliances. This allows for the safe and efficient use of electricity in homes and buildings.Rate this question:
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- 10.
____________ of Miletus discovered static electricity in 500 BC.
- A.
Spartacus
- B.
Euclid
- C.
Thales
- D.
Socrates
Correct Answer
C. ThalesExplanation
Thales of Miletus is credited with discovering static electricity in 500 BC. Thales was an ancient Greek philosopher, mathematician, and astronomer who made significant contributions to various fields. He is known for his experiments with amber, which led to the discovery of static electricity. Thales observed that when amber was rubbed with fur, it attracted lightweight objects like feathers. This discovery laid the foundation for the understanding of electricity and its properties.Rate this question:
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- 11.
A transducer that converts electric signals into sounds.
- A.
Speaker
- B.
Microphone
- C.
Amplifier
- D.
Crossover
Correct Answer
A. SpeakerExplanation
A speaker is a transducer that converts electric signals into sounds. When an electric current passes through the speaker's coil, it creates a magnetic field that interacts with a permanent magnet, causing the coil to move back and forth. This movement produces vibrations in the speaker cone, which in turn creates sound waves that can be heard by our ears. Therefore, a speaker is the correct answer as it is specifically designed to convert electric signals into audible sounds.Rate this question:
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- 12.
A transducer that converts mechanical energy into electrical energy is called ___________
- A.
Motor
- B.
Generator
- C.
Alternator
- D.
Rotor
Correct Answer
A. MotorExplanation
A motor is a device that converts mechanical energy into electrical energy. It typically consists of a rotor and stator, where the mechanical energy is converted into electrical energy through the interaction between the magnetic fields generated by the rotor and stator. Therefore, a motor is the correct answer for a transducer that converts mechanical energy into electrical energy.Rate this question:
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- 13.
The following are the contributions and discoveries of Michael Faraday except
- A.
Electromagnetic Induction
- B.
Motor
- C.
Faraday Effect
- D.
Wireless
Correct Answer
D. WirelessExplanation
Michael Faraday made significant contributions to the field of electromagnetism, including the discovery of electromagnetic induction, the invention of the electric motor, and the observation of the Faraday effect. However, wireless communication was not one of his specific contributions or discoveries. Faraday's work laid the foundation for the development of wireless technology, but he did not directly contribute to its invention or discovery.Rate this question:
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- 14.
The positively charge central part of an atom is called
- A.
Nucleus
- B.
Neutron
- C.
Electron
- D.
Proton
Correct Answer
A. NucleusExplanation
The positively charged central part of an atom is called the nucleus. It contains protons, which have a positive charge, and neutrons, which have no charge. The electrons, which have a negative charge, orbit around the nucleus. Therefore, the correct answer is "Nucleus".Rate this question:
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- 15.
The last electron found at the outermost shell of an atom is called ____________.
- A.
Valence
- B.
Keyence
- C.
Silence
- D.
Essence
Correct Answer
A. ValenceExplanation
The last electron found at the outermost shell of an atom is called the valence electron. The valence electron is important because it determines the atom's chemical properties and how it will interact with other atoms to form compounds.Rate this question:
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- 16.
Agapito Flores is a pinoy electrician who is said to be the first inventor of ____________.
- A.
LED
- B.
Fluorescent Lamp
- C.
Spinning top
- D.
Tiktok
Correct Answer
B. Fluorescent LampExplanation
Agapito Flores is credited as the first inventor of the fluorescent lamp. This invention revolutionized lighting technology by providing a more energy-efficient and longer-lasting alternative to traditional incandescent bulbs. Flores, a pinoy electrician, developed the concept of the fluorescent lamp, which utilizes a gas-filled tube to produce light when an electric current passes through it. His invention has had a significant impact on the lighting industry and is still widely used today.Rate this question:
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- 17.
It is the only particle of an atom that has no charge.
- A.
Neutron
- B.
Proton
- C.
Electron
- D.
Megatron
Correct Answer
A. NeutronExplanation
The neutron is the only particle of an atom that has no charge. It is located in the nucleus along with the positively charged protons. The neutron is neutral because it contains no electrical charge, unlike the proton which has a positive charge and the electron which has a negative charge. This lack of charge allows the neutron to interact with other particles in unique ways, contributing to the stability and behavior of the atom.Rate this question:
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- 18.
A set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.
- A.
Electricity
- B.
Electronics
- C.
Magnetism
- D.
Sana All
Correct Answer
A. ElectricityExplanation
Electricity is the correct answer because it refers to a set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. It involves the flow of electric current through conductors, the generation of electric fields, and the interaction of electric charges.Rate this question:
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- 19.
A device that converts DC to AC is called
- A.
Inverter
- B.
Converter
- C.
Alternator
- D.
Generator
Correct Answer
A. InverterExplanation
An inverter is a device that converts direct current (DC) to alternating current (AC). It is commonly used in applications where AC power is required, such as in homes or businesses that use solar panels or batteries. Inverters are designed to provide a steady and reliable source of AC power by converting the DC power from a battery or other DC source into AC power that can be used to operate various electrical devices. Therefore, an inverter is the correct answer for a device that converts DC to AC.Rate this question:
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- 20.
Bicol University Vision
- A.
A World-Class University Producing Leaders and Change Agents for Social Transformation and Development
- B.
A World-Class University Producing Leaders and Secret Agents for Social Transformation and Development
- C.
A First Class University Producing Leaders and Change Agents for Social Transformation and Development
- D.
A World-Class University Producing Leaders and Change Agents for Social Transportation and Development
Correct Answer
A. A World-Class University Producing Leaders and Change Agents for Social Transformation and DevelopmentExplanation
The correct answer is "A World-Class University Producing Leaders and Change Agents for Social Transformation and Development". This answer accurately reflects the vision of Bicol University, which aims to be a world-class institution that produces leaders and change agents who can contribute to social transformation and development. The use of "world-class" emphasizes the university's commitment to excellence and global standards.Rate this question:
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.jpg "A set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.")
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