Electrical Engineering XYZ shares basic Electrical MCQs that are important for everyone studying electronics and electrical. These MCQs are focused on basic units that are fundamental for electrical jobs, competitive tests, university exams. These units are also considered as general field competency for all engineering branches. Electrical engineering is a vast field that encompasses the study and application of various principles and concepts related to electricity and electrical systems. To understand and work effectively in this field, it is essential to have a solid grasp of the basic units used in electrical engineering. These units serve as the building blocks for all electrical measurements and calculations. One of the fundamental units is the Coulomb, which is the SI unit of charge. It represents the quantity of electric charge carried by a specific number of electrons or protons. Another crucial unit is the Weber, which is the SI unit of magnetic flux. It quantifies the total magnetic field passing through a given area. The watt, on the other hand, is a unit of power and measures the rate at which energy is transferred or used. It is named after the Scottish engineer James Watt. Additionally, it is important to distinguish between units of energy and units of power. Energy is measured in joules, while power is measured in watts. Other units covered in this article include newtons for force, meters for length, and hertz for frequency. Understanding these units is essential for performing calculations, analysing electrical systems, and ensuring the safe and efficient operation of electrical equipment. Given below are most important Basic Electrical Engineering Units MCQs for your Electrical Engineering exams, jobs interviews, and tests.
Contents
SI unit of charge is
SI unit of charge is:
- Coulomb
- Ampere
- Voltage
- Watts
Correct answer: 1. Coulomb
Explanation: The SI unit of charge is the coulomb. It represents the amount of electric charge carried by a certain number of electrons or protons. The coulomb is named after the French physicist Charles-Augustin de Coulomb, who made significant contributions to the study of electrostatics.
SI unit of magnetic flux is
SI unit of magnetic flux is:
- newton
- tesla
- weber
- farad
Correct answer: 3. weber
Explanation: The SI unit of magnetic flux is the weber. It is a measure of the total magnetic field passing through a given area. The weber is named after the German physicist Wilhelm Eduard Weber, who made important contributions to the field of electromagnetism.
Which one is not a unit of energy
Which one is not a unit of energy:
- watt
- kWh
- Wh
- joule
Correct answer: 1. watt
Explanation: The watt is not a unit of energy; it is a unit of power. Power is the rate at which energy is transferred or used. The watt is named after the Scottish engineer James Watt, who developed the steam engine and made significant contributions to the field of power measurement.
1 pound is equal to
1 pound is equal to:
- 2.224 newtons
- 4.448 newtons
- 8.996 newtons
- 36 newtons
Correct answer: 2. 4.448 newtons
Explanation: One pound is equal to 4.448 newtons. The newton is the SI unit of force and is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.
The disadvantage/disadvantages associated with overhead distribution systems is/are
The disadvantage/disadvantages associated with overhead distribution systems is/are:
- Lightning Surges
- Very high initial cost
- Both of these
- None of these
Correct answer: 1. Lightning Surges
Explanation: The main disadvantage associated with overhead distribution systems is the risk of lightning surges. These surges can cause damage to the distribution system and lead to power outages. While overhead distribution systems may have a higher initial cost compared to underground systems, the given question focuses specifically on the disadvantage of lightning surges.
1 yard equals
1 yard equals:
- 3 meters
- 0.9144 meters
- 1.1348 meters
- 0.3367 meters
Correct answer: 1. 0.9144 meter
Explanation: One yard is equal to 0.9144 meters. The yard is an imperial unit of length commonly used in the United States, while the meter is the SI unit of length.
horsepower is unit for
horsepower is unit for:
- Power
- Energy
- Force
- None of these
Correct answer: 1. power
Explanation: Horsepower is a unit for power. It is commonly used to measure the power output of engines and motors. The unit is named after the Scottish engineer James Watt, who introduced the concept of horsepower as a way to compare the power of steam engines to horses.
tesla is a unit for
tesla is a unit for:
- Magnetic flux
- Magnetic flux density
- Capacitance
- Torque
Correct answer: 2. Magnetic flux density
Explanation: The tesla is a unit for magnetic flux density. It is named after the Serbian-American inventor and electrical engineer Nikola Tesla, who made significant contributions to the field of electromagnetism and alternating current (AC) power systems.
1 kilogram is
1 kilogram is:
- 1.23 pounds
- 2.2 pounds
- 3 pounds
- 0.973 pounds
Correct answer: 2. 2.2 pounds
Explanation: One kilogram is equal to 2.2 pounds. The kilogram is the SI unit of mass, whereas the pound is an imperial unit of mass commonly used in the United States.
Unit of frequency is
Unit of frequency is:
- farads
- henry
- hertz
- ohm
Correct answer: 3. hertz
Explanation: The unit of frequency is the hertz (Hz). It represents the number of cycles or oscillations of a wave per second. The hertz is named after the German physicist Heinrich Hertz, who made important contributions to the study of electromagnetism and radio waves.