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The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879
Germanium has higher electron and hole mobilities compared to silicon, making it more sensitive to small magnetic fields in Hall effect experiments. Additionally, germanium has a lower bandgap energy, which allows for the Hall voltage to be easily measured at room temperature. Silicon, on the other hand, has a higher bandgap energy leading to less sensitivity in detecting small magnetic fields.
When a current carrying conductor placed in magnetic field than a voltage across the surface is arise this voltage is known as hall voltage and this phenomenon is know as hall effect. It is useful for consider whether the applied material is PNP or NPN
In the transistor, first letter denotes the material and the second letter denotes about the type of device. Hence here in sk100 transistor, first letter s denotes that it is a silicon transistor and second letter k denotes that it is a hall effect device.So, sk100 is a hall effect silicon transistor....
A Hall effect switch operates based on the Hall effect, which occurs when a magnetic field is applied perpendicular to the flow of current in a conductor. When a magnetic field is present, it induces a voltage (Hall voltage) across the conductor, which can be detected by a sensor. This change in voltage signals the switch to either open or close a circuit, allowing it to control devices like motors or lights without any physical contact. Hall effect switches are commonly used in applications where reliable, non-contact switching is desired.
Hall effect can be used to measure the strength of a magnetic field. When a current passes through a conductor in a magnetic field, a Hall voltage is generated perpendicular to both the current and the magnetic field. By measuring this Hall voltage, the strength of the magnetic field can be calculated.
A hall current sensor produces voltage by means of the "hall effect". It is used in automobile applications such as wheel speed sensors, tachometers, speedometers and ignition.
Hall effect devices are useful for sensing and measurement: electrical current, electrical power (with separate voltage measurement), magnetic field, movement, and position.
if hall voltage is positive then it is p-type & if it is negative then it is n-type semiconductor.
Hall Effect
The Hall effect.
because we have hall cofficient =1/ne. where the n=no of electron ,e=charge of electron. we know that "n "in metal is very large. so that R=HALL COFFICIENT" is very small FOR it .so we can not find sufficient result for hall cofficient so we use semi conductor which gives non zero hall cofficient.