Description
- Pohl's commutator is designed to measure the dielectric constant (also known as the relative permittivity) of various materials.
- It is often used as part of an electrostatics experiment to investigate how different materials affect electric field strength and capacitance.
- Pohl's commutator typically consists of a pair of cylindrical electrodes with a dielectric material placed between them. It also has a mechanism for rotating the electrodes.
- The apparatus allows for the controlled rotation of one of the electrodes relative to the other.
- A sample of the material whose dielectric constant is being measured is placed between the electrodes. This material affects the capacitance of the system.
For use hysteresis experiment-with brass C.P. Parts fitted on thick bakelite base.Pohl's commutator typically features a circular ring made of a conductive material, often copper or another metal. This ring serves as the core of the device.The ring is mounted on an axle, allowing it to rotate freely. Bearings are used to reduce friction and enable smooth rotation.Positioned on either side of the ring, two brushes make contact with the circular ring's surface. These brushes are typically made of carbon or another conductive material.A direct current power source, such as a battery, is connected to the brushes. When the power source is activated, it provides electrical energy to the commutator.When the power source is turned on, direct current flows through one of the brushes, into the conductive ring, and then out through the other brush. This flow of electricity sets the commutator in motion.