- 1. Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics, and electromagnetism. It involves designing, developing, testing, and supervising the manufacturing of electrical equipment, systems, and components. Electrical engineers work on a wide range of technologies, from power generation and distribution to communication systems, signal processing, and control systems. They apply principles of physics and mathematics to solve complex problems and create innovative solutions. Electrical engineering plays a crucial role in shaping modern society by enabling advancements in areas such as renewable energy, smart grids, electric transportation, and electronic devices.
What is the SI unit of electrical resistance?
A) Watt
B) Ampere
C) Volt
D) Ohm
- 2. What does AC stand for in the context of electrical engineering?
A) Alternating Current
B) Active Current
C) Analog Circuit
D) Ampere Control
- 3. What does DC stand for in the context of electrical engineering?
A) Dynamic Control
B) Decibel Calibrator
C) Digital Circuit
D) Direct Current
- 4. Which component stores electrical charge in a circuit?
A) Diode
B) Transistor
C) Resistor
D) Capacitor
- 5. What is the unit of electric current?
A) Watt
B) Volt
C) Ampere
D) Ohm
- 6. What is the relationship between voltage, current, and resistance in a circuit?
A) Newton's Law
B) Ohm's Law
C) Faraday's Law
D) Coulomb's Law
- 7. What type of material is used as a semiconductor in electronic devices?
A) Silicon
B) Copper
C) Gold
D) Aluminum
- 8. Which device converts mechanical energy into electrical energy?
A) Inverter
B) Motor
C) Generator
D) Transformer
- 9. Which law states that the total electric flux through a closed surface is equal to the net charge enclosed by the surface?
A) Ampere's Law
B) Gauss's Law
C) Newton's Law of Cooling
D) Faraday's Law
- 10. In a three-phase AC system, how many degrees are there between each phase?
A) 90
B) 120
C) 60
D) 180
- 11. Which component is used to protect electrical circuits from overcurrent?
A) Resistor
B) Fuse
C) Inductor
D) Diode
- 12. What is the unit of electric power?
A) Ampere
B) Volt
C) Ohm
D) Watt
- 13. Which law states that the induced electromotive force in any closed circuit is equal to the rate of change of magnetic flux through the circuit?
A) Faraday's Law
B) Planck's Law
C) Hooke's Law
D) Ohm's Law
- 14. What type of circuit allows only one path for current flow?
A) Combination
B) Complex
C) Series
D) Parallel
- 15. Which device is used to step up or step down voltage in an electrical circuit?
A) Transformer
B) Diode
C) Inductor
D) Capacitor
- 16. In a circuit, which component opposes the change in current flow?
A) Transistor
B) Fuse
C) Resistor
D) Inductor
- 17. What is the lowest layer in the OSI model that deals with electrical signals?
A) Application Layer
B) Physical Layer
C) Data Link Layer
D) Network Layer
- 18. Which law states that the heat produced in a conductor is proportional to the square of the current flowing through it?
A) Joule's Law
B) Ohm's Law
C) Kirchhoff's Law
D) Boyle's Law
- 19. What is the unit of electric charge?
A) Coulomb
B) Volt
C) Watt
D) Ohm
- 20. Which type of motor has a rotor that follows a rotating magnetic field produced by the stator?
A) Synchronous Motor
B) DC Motor
C) Stepper Motor
D) Induction Motor
- 21. Which material is commonly used as a good conductor in electrical wires?
A) Copper
B) Silver
C) Aluminum
D) Plastic
- 22. What is the process of converting analog signals into digital signals?
A) Digital-to-Analog Conversion
B) Analog-to-Digital Conversion
C) Signal Amplification
D) Frequency Modulation
- 23. Which law states that the sum of currents entering a node is equal to the sum of currents leaving the node?
A) Gauss's Law
B) Kirchhoff's Current Law
C) Ampere's Law
D) Ohm's Law
- 24. What is the unit of frequency?
A) Volt
B) Watt
C) Ampere
D) Hertz
- 25. What type of signal carries information through optical fibers in communication systems?
A) Electricity
B) Sound
C) Heat
D) Light
- 26. What is the function of a transistor in electronic circuits?
A) Store charge
B) Regulate voltage
C) Generate heat
D) Amplify or switch electronic signals
- 27. What is the process of converting sound waves into electrical signals?
A) Transduction
B) Vibration
C) Rectification
D) Modulation
- 28. Which electrical quantity is measured in coulombs?
A) Voltage
B) Resistance
C) Current
D) Charge
- 29. What does the term 'grounding' refer to in electrical systems?
A) Creating a short circuit
B) Increasing current flow
C) Generating electricity
D) Connecting a conductor to the Earth for safety and functionality
- 30. What is the purpose of a rectifier in a power supply circuit?
A) Regulate current
B) Convert AC to DC
C) Filter noise
D) Step up voltage
- 31. Which device is used to measure the flow of electric current in a circuit?
A) Ammeter
B) Multimeter
C) Voltmeter
D) Ohmmeter
- 32. What is the term for the opposition to the flow of alternating current in a circuit?
A) Impedance
B) Conductance
C) Resistance
D) Reactance
- 33. What is the purpose of a capacitor in an electronic circuit?
A) Control current flow
B) Generate heat
C) Store and release electrical energy
D) Amplify signals
- 34. Which type of circuit has multiple paths for current to flow?
A) Series Circuit
B) Complex Circuit
C) Parallel Circuit
D) Combination Circuit
- 35. What is the term for a material that does not allow the flow of electric current?
A) Conductor
B) Semiconductor
C) Insulator
D) Resistor
- 36. What component is used to amplify or switch electronic signals in electronic circuits?
A) Resistor
B) Inductor
C) Capacitor
D) Transistor
- 37. In a series circuit, how does the current compare at different components?
A) Halves at each component.
B) Is dependent on resistor values.
C) Doubles at each component.
D) The same.
- 38. Which type of battery is commonly used in portable electronic devices?
A) Lead-acid
B) Alkaline
C) Nickel-cadmium
D) Lithium-ion
- 39. What is the SI unit of electrical potential difference?
A) Ohm
B) Ampere
C) Volt
D) Watt
- 40. What component is used to convert AC to DC?
A) Inductor
B) Capacitor
C) Transformer
D) Rectifier
- 41. What is the primary function of a transistor?
A) Storage
B) Resistance
C) Amplification
D) Conduction
- 42. Which of the following is a passive component?
A) Operational Amplifier
B) Resistor
C) Transistor
D) Darlington Pair
- 43. What does PWM stand for?
A) Pulse Wave Modulation
B) Power Wave Multiplexer
C) Phase Width Monitoring
D) Pulse Width Modulation
- 44. Which component can store binary data in a computer?
A) Memory
B) Op-Amp
C) Capacitor
D) Resistor
- 45. What does RF stand for in electronics?
A) Regulated Frequency
B) Radio Frequency
C) Resistor Fuse
D) Rectified Frequency
- 46. What is a tool used to test if a circuit is open or closed?
A) Function Generator
B) Logic Analyzer
C) Multimeter
D) Oscilloscope
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