What is radial magnetic field? what is its importance in a moving coil galvanometer? how is a radial magnetic field realized in moving coil galvanometers?
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GALVANOMETER EXPERIMENT.
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A radial magnetic field is a magnetic field that is oriented perpendicular to the axis of rotation of a coil or disk. In a moving coil galvanometer, a radial magnetic field is created by placing the coil inside a cylindrical permanent magnet.
- The importance of a radial magnetic field in a moving coil galvanometer is that it generates a torque on the coil when current flows through it. This torque causes the coil to rotate, and the amount of rotation is proportional to the amount of current flowing through the coil. By measuring the angle of rotation of the coil, the current flowing through it can be determined.
- The realization of a radial magnetic field in a moving coil galvanometer is achieved by placing the coil inside a cylindrical permanent magnet, which generates a radial magnetic field that is perpendicular to the axis of rotation of the coil. The permanent magnet is usually made of a ferromagnetic material such as iron, and has a cylindrical shape with a circular cross-section. The coil is mounted on a thin, light suspension wire or fiber, which allows it to rotate freely in response to the torque generated by the magnetic field.
- Overall, the radial magnetic field is essential to the operation of a moving coil galvanometer, as it allows for the measurement of current flowing through a circuit.
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