Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > In a GaAs sample the electrons are moving und...
Start Learning for Free
In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density is
- a)1.6 x 104 A/cm2
- b)2.4 x 104 A/cm2
- c)1.6 x 108 A/cm2
- d)2.4 x 108 A/cm2
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In a GaAs sample the electrons are moving under an electric field of 5...
J = evn = (1.6 x 10-19)(107)(1016) = 1.6 x 104 A/cm2
Most Upvoted Answer
In a GaAs sample the electrons are moving under an electric field of 5...
Drift current density is the current density resulting from the motion of charge carriers in response to an applied electric field. It can be calculated using the equation:
J = q * n * μ * E
Where J is the current density, q is the charge of an electron, n is the carrier concentration, μ is the electron mobility, and E is the electric field.
Given:
Electric field (E) = 5 kV/cm = 5 x 10^5 V/m
Carrier concentration (n) = 10^16 cm^-3
Electron velocity (saturated velocity, v_s) = 10^7 cm/s
Now, let's calculate the drift current density step by step.
1. Convert the electric field from V/m to V/cm:
E = 5 x 10^5 V/m = 5 x 10^3 V/cm
2. Convert the electron velocity from cm/s to m/s:
v_s = 10^7 cm/s = 10^5 m/s
3. Calculate the electron mobility (μ) using the saturated velocity:
μ = v_s / E
= (10^5 m/s) / (5 x 10^3 V/cm)
= 2 x 10^1 m^2/Vs
4. Convert the carrier concentration from cm^-3 to m^-3:
n = 10^16 cm^-3 = 10^22 m^-3
5. Calculate the drift current density (J):
J = q * n * μ * E
= (1.6 x 10^-19 C) * (10^22 m^-3) * (2 x 10^1 m^2/Vs) * (5 x 10^3 V/cm)
= 1.6 x 10^4 A/cm^2
Therefore, the drift current density is 1.6 x 10^4 A/cm^2, which corresponds to option 'A'.
J = q * n * μ * E
Where J is the current density, q is the charge of an electron, n is the carrier concentration, μ is the electron mobility, and E is the electric field.
Given:
Electric field (E) = 5 kV/cm = 5 x 10^5 V/m
Carrier concentration (n) = 10^16 cm^-3
Electron velocity (saturated velocity, v_s) = 10^7 cm/s
Now, let's calculate the drift current density step by step.
1. Convert the electric field from V/m to V/cm:
E = 5 x 10^5 V/m = 5 x 10^3 V/cm
2. Convert the electron velocity from cm/s to m/s:
v_s = 10^7 cm/s = 10^5 m/s
3. Calculate the electron mobility (μ) using the saturated velocity:
μ = v_s / E
= (10^5 m/s) / (5 x 10^3 V/cm)
= 2 x 10^1 m^2/Vs
4. Convert the carrier concentration from cm^-3 to m^-3:
n = 10^16 cm^-3 = 10^22 m^-3
5. Calculate the drift current density (J):
J = q * n * μ * E
= (1.6 x 10^-19 C) * (10^22 m^-3) * (2 x 10^1 m^2/Vs) * (5 x 10^3 V/cm)
= 1.6 x 10^4 A/cm^2
Therefore, the drift current density is 1.6 x 10^4 A/cm^2, which corresponds to option 'A'.
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Top Courses for Electrical Engineering (EE)View all
In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer?
Question Description
In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer?.
In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer?.
Solutions for In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer?, a detailed solution for In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In a GaAs sample the electrons are moving under an electric field of 5 kV cm and the carrier concentration is uniform at 1016 cm-3. The electron velocity is the saturated velocity of 107 cm/s. The drift current density isa)1.6 x 104A/cm2b)2.4 x 104A/cm2c)1.6 x 108A/cm2d)2.4 x 108A/cm2Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup