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