GATE (Graduate Aptitude Test in Engineering) Physics (PE): Questions 88 - 92 of 1823
Choose Programs:
📹 Video Course 2024 (354 Lectures [236 hrs : 31 mins]): Offline Support
Rs. 1460.00 -OR-
1 Month Validity (Multiple Devices)
Preview All LecturesDetails
🎓 Study Material (327 Notes): 2024-2025 Syllabus
Rs. 400.00 -OR-
3 Year Validity (Multiple Devices)
Topic-wise Notes & SampleDetails
🎯 248 Numeric, 1575 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)
Rs. 550.00 -OR-
3 Year Validity (Multiple Devices)
CoverageDetailsSample Explanation
Help me Choose & Register (Watch Video) Already Subscribed?
Question 88
Appeared in Year: 2012
Question MCQ▾
Consider a system of three spins S1, S2 and S3 each of which can take values + 1 and – 1. The energy of the system is given by , where J is a positive constant. The minimum energy and the corresponding number of spin configurations are, respectively – (December)
Choices
Choice (4) | Response | |
---|---|---|
a. | – 3J and 1 | |
b. | – 6J and 2 | |
c. | J and 1 | |
d. | – 3J and 2 |
Question 89
Appeared in Year: 2014
Question MCQ▾
The free energy F of a system depends on a thermodynamic variable as with . The value of , when the system is in thermodynamic equilibrium, is – (June)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | Zero | |
c. | ||
d. |
Question 90
Appeared in Year: 2012
Question MCQ▾
A diode D as shown in the circuit has an I – V relation that can be approximated by –
The value of in the circuit is – (December)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 91
Appeared in Year: 2012
Question MCQ▾
Let denote the speed, the magnitude of momentum, and the energy of a free particle of rest mass m. Then – (December)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | p = mv | |
c. | ||
d. |
Question 92
Appeared in Year: 2014
Question MCQ▾
A system can have three energy levels: . The level is doubly degenerate, while the others are non-degenerate. The average energy at inverse temperature is – (June)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |