General Science • PhysicsMedium
What is the name of the instrument used to measure electric current with high precision, which operates on the principle of the magnetic effect of electric current and features a coil suspended in a magnetic field?
A. Voltmeter
B. Moving coil galvanometer✓ Correct Answer
C. Potentiometer
D. Wheatstone bridge
💡 Solution & Explanation
A moving coil galvanometer operates on the principle that a current-carrying coil placed in a uniform magnetic field experiences a deflecting torque proportional to the magnitude of the current. Voltmeters and potentiometers serve different measurement purposes, while a Wheatstone bridge is utilized for determining unknown electrical resistances. Galvanometers form the fundamental mechanism behind analog ammeters and voltmeters used in laboratory physics.
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