Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  What is the value of thermal resistance for t... Start Learning for Free
What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?
  • a)
    1.0°C/mW    
  • b)
    1.45°C/mW
  • c)
    1.2°C/mW    
  • d)
    0.2°C/mW
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
What is the value of thermal resistance for the 2N338 transistor for w...
Given, 
PC,max = 125 mW
We know that,
View all questions of this test
Most Upvoted Answer
What is the value of thermal resistance for the 2N338 transistor for w...
Calculating Thermal Resistance for 2N338 Transistor:
In this case, we are given the maximum power dissipation (PC,max) of the 2N338 transistor as 125 mW at a free-air temperature of 25°C and a maximum junction temperature of 150°C. To calculate the thermal resistance of the transistor, we can use the formula:

Thermal Resistance (θ) = (Tj - Ta) / PC,max
Where:
- θ is the thermal resistance
- Tj is the junction temperature (150°C)
- Ta is the ambient temperature (25°C)
- PC,max is the maximum power dissipation (125 mW)
Now, substituting the given values into the formula:
θ = (150°C - 25°C) / 125 mW
θ = 125°C / 125 mW
θ = 1.0 °C/mW
Therefore, the thermal resistance of the 2N338 transistor is 1.0 °C/mW. This means that for every 1 mW of power dissipated by the transistor, the junction temperature will increase by 1.0°C above the ambient temperature.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect answer is option 'A'. Can you explain this answer?
Question Description
What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect 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 What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect 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 What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect answer is option 'A'. Can you explain this answer?.
Solutions for What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect 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 What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice What is the value of thermal resistance for the 2N338 transistor for which the manufacturer specifies PC,max = 125 mW at 25°C free-air temperature and maximum junction temperature of 150°C?a)1.0°C/mW b)1.45°C/mWc)1.2°C/mW d)0.2°C/mWCorrect 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

Top Courses for Electrical Engineering (EE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev