Physics Exam  >  Physics Tests  >  Topic wise Tests for IIT JAM Physics  >  Crystals MCQ Level – 2 - Physics MCQ

Crystals MCQ Level – 2 - Physics MCQ


Test Description

10 Questions MCQ Test Topic wise Tests for IIT JAM Physics - Crystals MCQ Level – 2

Crystals MCQ Level – 2 for Physics 2024 is part of Topic wise Tests for IIT JAM Physics preparation. The Crystals MCQ Level – 2 questions and answers have been prepared according to the Physics exam syllabus.The Crystals MCQ Level – 2 MCQs are made for Physics 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Crystals MCQ Level – 2 below.
Solutions of Crystals MCQ Level – 2 questions in English are available as part of our Topic wise Tests for IIT JAM Physics for Physics & Crystals MCQ Level – 2 solutions in Hindi for Topic wise Tests for IIT JAM Physics course. Download more important topics, notes, lectures and mock test series for Physics Exam by signing up for free. Attempt Crystals MCQ Level – 2 | 10 questions in 45 minutes | Mock test for Physics preparation | Free important questions MCQ to study Topic wise Tests for IIT JAM Physics for Physics Exam | Download free PDF with solutions
Crystals MCQ Level – 2 - Question 1

What is the second nearest neighbour distance in bcc crystal whose conventional unit cell parameter is a?

Detailed Solution for Crystals MCQ Level – 2 - Question 1

In a bcc structure, for any atom at the corner of the lattice, nearest neighbour is at the centre of the lattice which is at a distance of  The second nearest neighbour is at the adjacent corners of the lattice at a distance of 'a'.
The correct answer is: a

Crystals MCQ Level – 2 - Question 2

The number of atoms per unit area of the plane [0 1 0] of a simple cubic crystal is :

Detailed Solution for Crystals MCQ Level – 2 - Question 2

[0 1 0] is the miller indices of the plane, hence, the intercept will be   the plane is in x-z plane passing through y = 1.
Now number of atoms in the plane for simple cubic lattice is = 

⇒ Number of atoms per unit area of plane [0 1 0] of simple cubic lattice is,
 (since, a = 2r).
The correct answer is: 

1 Crore+ students have signed up on EduRev. Have you? Download the App
Crystals MCQ Level – 2 - Question 3

If a two - dimensional lattice has the basic vector  hen the vectors of the reciprocal lattice are respectively;

Detailed Solution for Crystals MCQ Level – 2 - Question 3


The vectors of reciprocal lattice are




The correct answer is: 

 

Crystals MCQ Level – 2 - Question 4

In crystallographic notations, the vector  is the cubic cell shown is the figure is :

Detailed Solution for Crystals MCQ Level – 2 - Question 4

Coordinates of pointis , hence, in crystal notation the plane is [2 2 1]
The correct answer is: [2 2 1]

Crystals MCQ Level – 2 - Question 5

[3 2 6] are the miller indices of a plane, the intercept mode by the plane on the 3 crystallographic axes are:

Detailed Solution for Crystals MCQ Level – 2 - Question 5

Miller indices are (3, 2, 6)
Hence, crystallographic axis are

The correct answer is: (2a, 3b, c)

Crystals MCQ Level – 2 - Question 6

Consider the atomic packing factor (APF) of the following crystal structures :
P. Simple cubic
Q. Body centred cubic
R. Face centred cubic
S. Diamond T. Hexagonal close packed
Q. Which two of the above structure have equal APF?

Detailed Solution for Crystals MCQ Level – 2 - Question 6

simple cubic → 52%, bcc → 68%, fcc → 74%, diamond → 34%, hcp 74%
The correct answer is: R and T

Crystals MCQ Level – 2 - Question 7

If d be the space between parallel lattice planes and  be reciprocal lattice vector, then which of the following relations are true?

Detailed Solution for Crystals MCQ Level – 2 - Question 7

If is unit vector normal to the plane, then

If d is the interplanar. distance,

where  is the translation vector along one of the unit axis.
Here the planes are perpendicular to this unit axis 

The correct answer is: 

Crystals MCQ Level – 2 - Question 8

Volume of primitive cell of bcc structure having conventional lattice parameter a is :

Detailed Solution for Crystals MCQ Level – 2 - Question 8

For bcc structure :




The correct answer is: 

Crystals MCQ Level – 2 - Question 9

For a NaCI crystal, the cell edge a = 0.563 nm. The smallest angle at which Bragg reflection can occur corresponds to a set of planes whose indices are :

Detailed Solution for Crystals MCQ Level – 2 - Question 9

The correct answer is Option 4: [1 1 1]. The smallest angle at which Bragg reflection can occur corresponds to a set of planes with indices [1 1 1]. This is because the interplanar spacing d of the crystal planes is equal to the unit cell dimension ao for NaCl crystals. Thus, for Bragg's law to be satisfied, the path length difference between waves effectively reflected by two adjacent planes must be equal to 2d sin 8, or mA, where m is an integer. For m = 1, the Bragg angle 8 is equal to arcsin (1/2a) which is equal to arcsin (1/2 x 0.563) = 54.7°. The Miller indices of the planes satisfying this condition are [1 1 1].

Crystals MCQ Level – 2 - Question 10

For a simple cubic lattice d100 : d110 : d111 is.

Detailed Solution for Crystals MCQ Level – 2 - Question 10


The correct answer is: 

217 tests
Information about Crystals MCQ Level – 2 Page
In this test you can find the Exam questions for Crystals MCQ Level – 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Crystals MCQ Level – 2, EduRev gives you an ample number of Online tests for practice
Download as PDF