GATE (Graduate Aptitude Test in Engineering) Physics: Questions 124 - 128 of 659

Access detailed explanations (illustrated with images and videos) to 659 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

How to register? Already Subscribed?

Question 124

Appeared in Year: 2012

Question

MCQ▾

In the following circuit, the voltage drop across the ideal diode in forward bias condition is .

Circuit Diagram of Three Resistors and a Diode

The current passing through the diode is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 125

Appeared in Year: 2012

Question

MCQ▾

Consider a system whose three energy levels are given by . The energy level is two – fold degenerate and the other two are non – degenerate. The partition function of the system with is given by –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 126

Appeared in Year: 2012

Question

MCQ▾

For an ideal Fermi gas in three dimensions, the electron velocity at the Fermi surface is related to electron concentration as,

Choices

Choice (4)Response

a.

b.

c.

d.

Question 127

Appeared in Year: 2012

Question

MCQ▾

A paramagnetic system consisting of N spin – half particles, is placed in an external magnetic field. It is found that spins are aligned parallel and the remaining spins aligned antiparallel to the magnetic field. The statistic entropy of the system is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 128

Appeared in Year: 2012

Question

MCQ▾

Inverse susceptibility as a function of temperature, for a material undergoing paramagnetic to ferromagnetic transition is given in the figure, where is the origin. The values of the Curie constant, , and the Weiss molecular field constant, , in CGS units, are –

Inverse Susceptibility vs Temperature

Choices

Choice (4)Response

a.

b.

c.

d.

Developed by: