Figure \(\PageIndex{2}\) Hall effect in presence of both holes (h) and electrons (e) \(^{[3]}\). The Hall Effect is used for obtaining information regarding the semiconductor type, the sign of charge carriers, to measure electron or hole concentration and the mobility. Hall Effect Consider the sample of p-type semiconductor with current density J x flowing in the x-direction. Utilizing the Hall effect to measure blood flow. This demonstration shows Hall effect in semiconductor materials and shows how n-type and p-type semiconductors can be identified. A Hall effect transducer measuring small distances. THEORY :-If a current carrying semiconductor specimen is placed in a magnetic field , then an induced Electric field is generated , which will produced potential difference between two surfaces of semiconductor .This potential difference is known as âHall Voltageâ and is proportional to magnetic field and current () The Hall effect describes the behavior of the free carriers in a semiconductor when applying an electric as well as a magnetic field. Figure 2. Principle of Hall Effect. The experimental setup shown in Figure 2.7.8, depicts a semiconductor bar with a rectangular cross section and length L. A voltage V x is applied between the two contacts, resulting in a field along the x-direction. HALL EFFECT IN p-TYPE SEMICONDUCTOR. This effect is known as Hall effect. The principle of Hall Effect states that when a current-carrying conductor or a semiconductor is introduced to a perpendicular magnetic field, a voltage can be measured at the right angle to the current path. The phenomenon is called HALL EFFECT. In the presence of a magnetic field B 0 along the z-direction, the holes will experience a force (the Lorentz force) driving them towards the bottom of the sample as shown in Figure 1. If both holes and electrons are conduction carriers, then a different derivation has to be done to solve for Hall coefficient. As shown consider a rectangular plate of a p-type semiconductor of width âwâ and thickness âdâ placed along x-axis. Hall Effect was discovered by Edwin Herbert Hall in 1879. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share â¦ Being very simple and straight forward phenomena in physics, Hall effect is a fundamental principle in magnetic field sensing and have many practical applications in our daily life. 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