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Which of the following quantities cannot be measured/determined using Hall Effect?
- a)Mobility of charge carriers
- b)Carrier concentration
- c)Type of semiconductor (p or n)
- d)Diffusion constant
- e)Both carrier concentration and the type of semiconductor (p or n)
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following quantities cannot be measured/determined using ...
Hall Effect: It states that if a “specimen (meta or semiconductor) carrying the current I is placed in traverse magnetic field B, then Electric field Intensity E is induced in a direction perpendicular to both I and B”.
Hall Voltage is given by:
The hall coefficient is given as:
Where,
ρ = charge density = σ / μ
n = charge concentration
σ = conductivity
μ = mobility constant
Hence Hall coefficient becomes
From Hall Experiment, we can determine the following properties:
Hall Voltage is given by:
The hall coefficient is given as:
Where,
ρ = charge density = σ / μ
n = charge concentration
σ = conductivity
μ = mobility constant
Hence Hall coefficient becomes
From Hall Experiment, we can determine the following properties:
- Whether the specimen is a metal or semiconductor. In the case of semiconductors, we can find whether it is intrinsic, N-type, or P-type.
- The carrier concentration in the sample.
- Mobility of charge carriers.
- Used in designing Hall effect transducers.
- Hall voltage is induced in between the bottom and upper surfaces of the specimen.
- If the polarity of hall voltage is positive for the bottom surface, the given specimen is P-type.
Note: Diffusion constant is found from electron mobility using Einstein's relationship.
Community Answer
Which of the following quantities cannot be measured/determined using ...
Hall Effect: It states that if a “specimen (meta or semiconductor) carrying the current I is placed in traverse magnetic field B, then Electric field Intensity E is induced in a direction perpendicular to both I and B”.
Hall Voltage is given by:
The hall coefficient is given as:
Where,
ρ = charge density = σ / μ
n = charge concentration
σ = conductivity
μ = mobility constant
Hence Hall coefficient becomes
From Hall Experiment, we can determine the following properties:
Hall Voltage is given by:
The hall coefficient is given as:
Where,
ρ = charge density = σ / μ
n = charge concentration
σ = conductivity
μ = mobility constant
Hence Hall coefficient becomes
From Hall Experiment, we can determine the following properties:
- Whether the specimen is a metal or semiconductor. In the case of semiconductors, we can find whether it is intrinsic, N-type, or P-type.
- The carrier concentration in the sample.
- Mobility of charge carriers.
- Used in designing Hall effect transducers.
- Hall voltage is induced in between the bottom and upper surfaces of the specimen.
- If the polarity of hall voltage is positive for the bottom surface, the given specimen is P-type.
Note: Diffusion constant is found from electron mobility using Einstein's relationship.
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Which of the following quantities cannot be measured/determined using Hall Effect?a)Mobility of charge carriersb)Carrier concentrationc)Type of semiconductor (p or n)d)Diffusion constante)Both carrier concentration and the type of semiconductor (p or n)Correct answer is option 'D'. Can you explain this answer?
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