what is the hall efect? how to determine the sign of the charge carriers? how to...
Homework Answers
When magnetic field is applied perpendicular to the flow of current carried by an electrical conductor, potential difference is created. This is called hall effect.
To determine the sign of the mobile charges in a current carrying conductor by measuring the Hall voltage. If the voltage is positive then the mobile charges are positive and if hall voltage is negative sign of charges is negative
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what is the hall efect?
how to determine the sign of the charge carriers?
how to...
Hall effect: Describe the Hall effect with the aid of a neat, labelled diagram. What is...
Hall effect: Describe the Hall effect with the aid of a neat, labelled diagram. What is the significance of the Hall effect, how can it be used to characterise metals and semi- conductors? Show that the Hall voltage, Vh, is given by VH= VpBw where w is the width of the wafer of material, vp is the drift velocity of the charge carriers and B the perpendicular magnetic flux density.
What determine the mobility of charge carriers in crystalline materials
What determine the mobility of charge carriers in crystalline materials
4. (10 pts.) A piece of p-type semiconductor (in which the charge carriers have a positive...
4. (10 pts.) A piece of p-type semiconductor (in which the charge carriers have a positive charge) is subjected to a Hall effect experiment as shown below: Red Black . Red Determine which way the magnetic field is actually pointing of the two possible directions shown, up or down), given that /> 0 and the voltage measured by the voltmeter VA is positive (the voltmeter might not be corrected in the conventional polarity for Hall measurements). Clearly illustrate your reasoning...
(a) You need to dope Si to produce free positive charge carriers. (i) Explain how this...
(a) You need to dope Si to produce free positive charge carriers. (i) Explain how this process will be achieved by sketching a 2D representation of the Si crystal lattice to show the effect of this doping process. Clearly explain what impurities you will use for this process. (3)
I tried to solve this exercise: Which says to think about the Hall effect, but usually...
I
tried to solve this exercise:
Which says to think about the Hall effect, but usually there’s
an external current flow when considering this effect, so I tried
to solve the exercise in another way. My questions are:
1) did I solve it right (see below)?
2) how can I solve the exercise considering the Hall effect
(and Lorentz force) ?
A cubic metal volume of side d =1.5? and density of charge carriers n is moving along y-axis with...
A Hall-effect probe operates with a 120-mA current. When the probe is placed in a uniform...
A Hall-effect probe operates with a 120-mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0820 T, it produces a Hall voltage of 0.720 V. (a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.320 WV. What is the magnitude of the unknown field? x Your response differs from the correct answer by more than 10%. Double check your calculations. mt (b) The thickness of the probe in the...
Electrical charge is transferred in metals by movement of valence electrons. How many potential charge carriers...
Electrical charge is transferred in metals by movement of valence electrons. How many potential charge carriers are there in barium wire (Z=56, ρ=3.62g/cm3, AM=137.33 g/mol) 3 mm in diameter and 25 meter in length?
(a) You need to dope Si to produce free positive charge carriers. (1) Explain how this...
(a) You need to dope Si to produce free positive charge carriers. (1) Explain how this process will be achieved by sketching a 2D representation of the Si crystal lattice to show the effect of this doping process. Clearly explain what impurities you will use for this process. (ii) Sketch the energy band diagram of this doped material in (i) at 0 K and identify all the important features in your diagram. (iii) Now sketch the same energy band diagram...
30. The Hall-effect generator is constructed of a. N material 31. What three factors determine voltage...
30. The Hall-effect generator is constructed of a. N material 31. What three factors determine voltage amplitude produced by a Hall generator? a. Size of Hall generator b. Polarity of voltage applied c. Magnetic field strength b. P material (select all) d. Magnitude of current applied by source e. Temperature of Hall generator 32. What are two methods used to increase output signal from a Hall generator? use a diode across device b. use of concentrators (tuning) a. c. increase...
What is the spin Hall effect? How is it affected by magnets? Explain both in detail,...
What is the spin Hall effect? How is it affected by magnets? Explain both in detail, in words a common person could understand.
Hall effect: Describe the Hall effect with the aid of a neat, labelled diagram. What is the significance of the Hall effect, how can it be used to characterise metals and semi- conductors? Show that the Hall voltage, Vh, is given by VH= VpBw where w is the width of the wafer of material, vp is the drift velocity of the charge carriers and B the perpendicular magnetic flux density.
4. (10 pts.) A piece of p-type semiconductor (in which the charge carriers have a positive charge) is subjected to a Hall effect experiment as shown below: Red Black . Red Determine which way the magnetic field is actually pointing of the two possible directions shown, up or down), given that /> 0 and the voltage measured by the voltmeter VA is positive (the voltmeter might not be corrected in the conventional polarity for Hall measurements). Clearly illustrate your reasoning...
(a) You need to dope Si to produce free positive charge carriers. (i) Explain how this process will be achieved by sketching a 2D representation of the Si crystal lattice to show the effect of this doping process. Clearly explain what impurities you will use for this process. (3)
I
tried to solve this exercise:
Which says to think about the Hall effect, but usually there’s
an external current flow when considering this effect, so I tried
to solve the exercise in another way. My questions are:
1) did I solve it right (see below)?
2) how can I solve the exercise considering the Hall effect
(and Lorentz force) ?
A cubic metal volume of side d =1.5? and density of charge carriers n is moving along y-axis with...
A Hall-effect probe operates with a 120-mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0820 T, it produces a Hall voltage of 0.720 V. (a) When it is used to measure an unknown magnetic field, the Hall voltage is 0.320 WV. What is the magnitude of the unknown field? x Your response differs from the correct answer by more than 10%. Double check your calculations. mt (b) The thickness of the probe in the...
(a) You need to dope Si to produce free positive charge carriers. (1) Explain how this process will be achieved by sketching a 2D representation of the Si crystal lattice to show the effect of this doping process. Clearly explain what impurities you will use for this process. (ii) Sketch the energy band diagram of this doped material in (i) at 0 K and identify all the important features in your diagram. (iii) Now sketch the same energy band diagram...
30. The Hall-effect generator is constructed of a. N material 31. What three factors determine voltage amplitude produced by a Hall generator? a. Size of Hall generator b. Polarity of voltage applied c. Magnetic field strength b. P material (select all) d. Magnitude of current applied by source e. Temperature of Hall generator 32. What are two methods used to increase output signal from a Hall generator? use a diode across device b. use of concentrators (tuning) a. c. increase...
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