Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain hall affect and derive the mathematical expression for hall coefficient, also describe its applications.
Sol. Hall effect
If a metal or semiconductor material carrying current I is placed under a transverse magnetic field B, then an electric field E is developed in the direction perpendicular to both I and B. this phenomenon is called as Hall Effect and is shown in Fig. Assuming that current knows from left to right in x direction and the semiconductor bar is kept under influence of magnetic field B acting in z direction, then bar will experience an electromagnetic force acting in downward direction. In the above fig. if the semiconductor bar is of p type then charge carriers are holes and current I flowing in the bar will be due to movement of holes from left to right. Since the electromagnetic force is acting downward, charge carries are pressed downwards and more holes accumulate near side I. Thus side I become more positively charged with respect to side 2. Therefore a potential difference is developed between side 1 and side. This voltage is called as hall voltage and is denoted as VH. If the semiconductor bar is n type, then current will flow in the given direction because of movement of electrons in opposite direction. Due to force, these charge carriers will accumulate downward near side 1 making it negatively charge with respect to side 2. Hall voltage developed this time is opposite to that of in case of p type semiconductor bar.
The dielectric constant of air is practically taken as (A) more than unity. (B) Unity. (C) less than unity. (D) Zero.
A unity negative feedback control system has an open loop transfer function consisting of two poles, two zeros and a variable positive gain K. The zeros are located at -2 and -1, a
Military Services - Application of Software Defined Radio With the use of SDR technology, the military can reduce radio development costs by providing a common platform to whi
charges of +2q and -4q are fixed a distance d apart as in figure_2(a).find electric field at the point A ,B and C (b) sketch roughly the electric field lines.
Dc basing bits: Operating point: operating is cut off; saturation and linear region of bits character are provided as follow: (1) Linear-region operation (2) (1)
Q. A commercial FMstation broadcasts a signal with 180-kHz bandwidth when |f(t)|max = 2 V. Find kFM for the modulator if the spectral extent of f (t) is 30 kHz, by using Carson's r
Addition of binary numbers Example: Add 110010102 ( -510). and 00000101 2 (+5 10 ) Solution : Binary signed
Q. Show the Amenability to computer processing? Due to the digital data collected and stored in the form of a matrix, the same becomes amenable to processing on computers. By f
Hai.. i have been given a open loop transfer function to draw a bode plot with a particular K value and they asked me to find the value of K for which the phase margin becomes 45d
Discuss the layout configuration of FMS with neat and clean diagram? Write the disadvantages and advantages of FMS? Write the short note on following: a) Applications of FMS
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd