GATE PH topic:applied-physics PYQs & Answers — Page 64

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topic:applied-physics

Questions 631–640 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 64 of 65

Using Hund’s rule, the total angular momentum quantum number

for the electronic ground state of the nitrogen atom is

Your answerChoose one option.

1/2

3/2

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Which one of the following operators is Hermitian?

Your answerChoose one option.

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The real space primitive lattice vectors are

and

. The reciprocal space unit vectors

and

for this lattice are, respectively

Your answerChoose one option.

and

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Consider two particles and two non-degenerate quantum levels 1 and 2. Level 1 always contains a particle. Hence, what is the probability that level 2 also contains a particle for each of the two cases: (i) when the two particles are distinguishable and (ii) when the two particles are bosons?

Your answerChoose one option.

(i) 1/2 and (ii) 1/3

(i) 1/2 and (ii) 1/2

(i) 2/3 and (ii) 1/2

(i) 1 and (ii) 0

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A person weighs

at Earth's north pole and

at the equator. Treating the Earth as a perfect sphere of radius 6400 km, the value

is ________. (up to two decimal places). (Take

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The geometric cross-section of two colliding protons at large energies is very well estimated by the product of the effective sizes of each particle. This is closest to

Your answerChoose one option.

10 b

10 mb

10 pb

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For the transistor amplifier circuit shown below with

, and

. Neglecting the emitter diode resistance, the input impedance of the amplifier looking into the base for small ac signal is ________ k

. (up to two decimal places).

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Consider an ideal operational amplifier as shown in the figure below with

. For an applied input voltage

, the current passing through

is ________

. (up to two decimal places).

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Consider the differential equation

. If

is ________. (up to two decimal places).

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Positronium is an atom made of an electron and a positron. Given the Bohr radius for the ground state of the Hydrogen atom to be 0.53 Angstroms, the Bohr radius for the ground state of positronium is ________ Angstroms. (up to two decimal places).

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GATE PH topic:applied-physics PYQs

Question 46

Question 47

Question 48

Question 49

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Question 51

Question 52

Question 53

Question 54

Question 55