Author: Study Clue

What is the purpose of a waveguide in an electromagnetic system? A Amplify signals B Reflect signals C Transmit signals

Which of the following describes Faraday’s law of induction? A Current generation B Magnetic flux change C Electric field intensity

What is the basic property of an electromagnetic wave? A Frequency B Perpendicular fields C Electric field D Magnetic field

What is the main source of electromagnetic waves? A Electric dipoles B Electric charge C Magnetic charge D Electric current

Which device is commonly used for temperature measurement in electrical systems? A Strain gauge B Thermistor C Thermocouple D Piezoelectric

What does calibration ensure in electrical measurement systems? A Accuracy B Sensitivity C Voltage D Power Explanation Calibration ensures that

What is the function of a frequency meter in a power system? A Measure current B Measure resistance C Measure

Which transformer isolates and steps down current for measurement? A Current transformer (CT) B Potential transformer (PT) C Step-up transformer

Which device is used to step down high voltage in a system? A Ammeter B Potential transformer C Multimeter D

Which device is used to measure electrical resistance? A Wattmeter B Ammeter C Ohmmeter D Voltmeter Explanation An ohmmeter measures