The angular position of cells remains the same for a sample of a crystal. This property is called___________________?

Related Mcqs:

1. hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?

   WA. 180°
   B. 0°
   C. 90°
   D. 45°

2. The relation between linear and angular acceleration is______________?

   A. a = a x r
   B. a = r x a
   C. a = a x r
   D. r = a x a

3. If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?

   A. 4 rad. S-1
   B. 5 rad. S-1
   C. 1.6 rad. S-1
   D. 2.8 ms-1

4. The angular speed for daily rotation of the earth in rad S-1 is______________?

   A. 7.3 x 10 radians/second
   B. 7.3 x 5 radians/second
   C. 3.7 x 10 7.3 x 5 radians/second
   D. 7.3 x 10-5 radians/second

5. In an angular motion, Newton’s second law of motion is_____________?

   A. F=ma
   B. F=τp/It
   C. Στ = I α
   D. All above

6. The angular speed of seconds hand of a watch in rads-1 is______________?

   A. π
   B. π/2
   C. π/30
   D. π/180

7. The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?

   A. π
   B. 3π
   C. 6π
   D. 12π

8. If the density of atoms remain same along any direction in a crystal is called__________________?

   A. Symmetry
   B. Homogeneity
   C. Isotropy
   D. Cleavage

9. X-rays are diffracted by a crystal but not by a diffraction grating because_____________?

   A. The ions in a crystal are well arranged
   B. The lines in a diffraction grating cannot reflect X-rays.
   C. The penetration power of X-rays is high in a diffraction grating
   D. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal

10. To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?

    A. 2
    B. 3
    C. 4
    D. 5