A moving coil galvanometer is based on the following effect of current:
Correct answer: B. Magnetic effect
- A. Chemical effect
- B. Magnetic effect
- C. Heating effect
- D. All
Explanation
The magnetic effect of current, also known as the Ampere's law, is the phenomenon where an electric current flowing through a conductor produces a magnetic field around the conductor. This magnetic field can interact with other magnetic fields, leading to various electromagnetic phenomena. In a moving coil galvanometer, the magnetic effect of current is crucial. The coil of the galvanometer is placed in a magnetic field, and when current flows through the coil, it experiences a torque due to the interaction between the magnetic field and the magnetic moment of the coil. This torque causes the coil to rotate, which is the basis for the operation of the galvanometer.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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