The working principle of a galvanometer is based upon:
Correct answer: B. Torque
- A. Momentum
- B. Torque
- C. Force
- D. Impulse
Explanation
Option B) Torque is corrrect. A galvanometer is an instrument used for detecting and measuring electric current. Its working principle is based on the concept of torque. When an electric current flows through a coil of wire within a magnetic field, it experiences a torque, which causes the coil to rotate. This rotation is proportional to the strength of the current passing through the coil. The torque on the coil in a galvanometer is generated by the interaction between the magnetic field and the magnetic moment of the coil, which is induced by the current passing through it. The greater the current, the greater the torque, leading to a larger deflection of the galvanometer needle.
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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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