Question 328Electricity/Electronics - QMED70% to pass
Which of the following would best describe a standard electric meter movement that uses the principles of electromagnetism to measure current?
AI Explanation
The correct answer is A) moving coil meter movement.
A moving coil meter movement uses the principles of electromagnetism to measure electric current. It consists of a coil of wire suspended in a magnetic field. When current flows through the coil, it creates a magnetic field that interacts with the fixed magnetic field, causing the coil to rotate. The degree of rotation is proportional to the current, which is displayed on the meter scale.
The other options are incorrect because:
B) digital movement does not use electromagnetism, but rather electronic components to measure and display the current.
C) hot-wire movement uses the heating effect of current to measure, rather than electromagnetism.
D) rectifier movement uses a rectifier to convert AC to DC before measuring the current, rather than directly using electromagnetism.
Related Questions
#326 To limit the current flow through a DC voltmeter to as low a value as possible, what is the moving coil circuit provided with? #327 Which of the listed meters uses a shunt connected in series with the load, but parallel with the meter movement? #329 An internal resistance is placed in series with the meter movement of which of the following instruments? #330 Which of the electronic schematic symbols represents the capacitor illustrated in figure 2 of the illustration? Illustration EL-0015 #331 Which of the illustrated schematic symbols represents the type of switch pictured in figure "F" of the illustration? Illustration EL-0026