Author: Study Clue

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

What is the primary purpose of an electrical measuring instrument? A Generate power B Display voltage C Store data D

What is the primary principle behind Ohm’s law? A Voltage equals current times resistance B Current equals resistance times voltage