Question 328Electricity & Electronics - QMED

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.