Experimental apparatus for quantitative measurement of the magnetic field generated by the current flowing in the conductor

摘要

In the present invention, a dip of the magnet is made zero, a hole is formed in the central portion thereof to sandwich the shaft, a thin glass is attached by cutting the upper end of the shaft, and a laser beam And the reflected light is displayed on the screen with the angle scale, so that the intensity of the magnetic field can be measured quantitatively.;As the restoring force of the magnet, the horizontal magnetic force of the earth magnetic field was used for the straight wire and the circular wire, the fixed circular magnet was used for the solenoid, and the surface reflection of the glass was used for reducing the experimental error. In addition, the fulcrum of the shaft was wide-angle processed so that the shaft could rotate freely, and cemented carbide was used as the shaft.;Since the laser beam is reflected from the glass surface and appears on the screen twice as much incident light due to the reflection law, it can accurately measure the intensity of the magnetic field around the linear conductor, around the circular conductor, and inside the solenoid The center of the magnet can move up and down and move back and forth so that the distance can be easily measured. In addition, a rotating plate was used to match the zero point of the magnet.