Millennium Scholastic School and College
Jahangirabad Cantonment, Bogura
Class XI
Subject: Physics
Syllabus
Chapter 9: Atomic Model and nuclear physics (2nd paper)
Chapter 7: Structural properties of mater (1st paper)
MCQ
1. Who did the alpha particle scattering experiment?
a) Thompson b) Bohr c) Rutherford d) Curie
2. What is energy of ground state of hydrogen Atom
a) -13.6 eV b) -13.6 J c) -13.6 N d) 13.6 J
3. In which of the following number of Neutrons and Protons is same?
a) 13Al 27 b) 3Li 7 c) 2He 4 d) 1H 1
4. 1 Ci means disintegration of how many atoms?
a) 3.7 ×10-10s-1 b) 3.7 ×107s-1 c) 3.7 ×104s-1 d) 1 s-1
5. How many protons are there in silicon nucleus?
a) 4 b) 14 c) 29 d) 32
6. Ratio of average life and half life of Radium is?
a) -0.367 b) 0.367 c) 0.693 d) 1.44
7. What is the value of decay constant of K40?
a) 0.38×10-17s b) 1.2 ×10-17s c) 1.73 ×10-17s d) 10.35×10-17s
8. What is the charge of a proton?
a) 1.6 ×1019C b) 1.67 ×10-27C c) 1.6 ×10-19C d) 1.67 ×10-23C
9. What is the wavelength of the radiated ray when electron of Hydrogen atom is
incident from higher energy state to lower energy state?
a) 1.1×10-6m b) 1.2 ×10-6m c) 1.3 ×10-6m d) 1.4×10-6m
10. This wave length belong to which part of electromagnetic spectrum of light?
a) Infrared b) Ultraviolet c) Visible light d) X-rays
11. Characteristics of alpha particle are-
i) They carry positive charge
ii) These are deflected by electric and magnetic field
iii) These are double aionized Helium atom
Which one is correct?
a) I and ii b) ii and iii c) I and iii d) I, ii and iii
12. if an electrons travel from E2 to E1 energy state, then wavelength of the radiant
energy can be known by which of the following equation?
E 2−E 1 hc hc c hc
a) λ¿ b) λ¿ − c) λ¿ d) λ¿
h E2 E1 h( E 2−E 1) E 2−E 1
13. Radio activity is-
i) a nuclear phenomenon
ii) A continuous event
iii) Not influenced by external field
Which of the following is true?
a) i and ii
b) i and iii
c) ii and iii
d) i, ii and iii
14. α- particle β-particle
238
92 U -----→ Th Pa
----→
In the figure what is the number of protons of protechtinium?
a) 95 b) 91 c) 90 d) 89
15. Half life of a radioactive element is-
0.693
i) T¿
λ
ii) T= 0.693 s
iii) T= 0.693τ
Which of the following is true
a) 1 and ii
b) i and iii
c) ii and iii
d) i, ii and iii
16. What are the units for coefficient of viscosity?
a) N.m.s-1 b) a) N.m-1.s c) N-1.m-1.s d) N.m.s-2
17. How much force would be needed to extend a wire of cross section 1 cm2 by its original
length? [y=2×1011 N/m2]
a) 2×107 N b) 4×107 N c) 2×105 N v) 4×105 N
18. The surface energy of a liquid is numerically-
a) Half of the surface tension b) Equal to the surface tension
c) Double the surface tension d) Triple the surface tension
19. What is the angle of contact of liquid which do not wet glass
a) Almost zero b) Almost 900 c) Less than 900 d) Greater than 900
20. Which of these liquids has the height viscosity?
a) a) Oil b) Milk c) Honey d) Water
21. If the lateral strain on a wire is 0.0024 when the deformation is 0.01, what is Poisson’s
ratio for the wire?
a) 0.024 b) 0.24 c) 0.42 d) 2.4
22. What is another name for the bulk modulus?
a) Compressibility b) In compressibility c) Shear modulus d) Elastic modulus
23. Which of these is true in case of Poisson’s ratio?
a) 1˂ σ ˂0.5 b) -1˂ σ ˂0.5 c) -1˂ σ ˂1 d) -1˂ σ ˂-0.5
24. What is the work done in extending a wire?
a) W = ½ Fl b) W= Fl c) W= 2Fl d) W= ½ Fl2
25. the angle of contact depends on –
i) the type of the liquid and solid
ii) the height of the liquid
iii) the purity of the liquid and the solid
Which one is correct?
a) i and ii b) i and iii c) ii and iii d) i, ii and iii
26. Poisson’s ratio-
i) is the ratio of extension and lateral strain
ii) has no units
iii) has a value from -1 to 0.5
Which one is correct
a) i and ii b) i and iii c) ii and iii d) i, ii and iii
27. If σ=0.2 for the wire, by how much will it’s radius decrease?
a) 2.26mm b) 0.226 mm c) 0.0226 d) 0.00226 mm
Three wire A, B and C of the same length are applied with the same stress, for which the
lengths increased by 5%, 2% and 1% respectively (Answer 28 and 29).
28. What was the strain on wire B?
a) 2 b) 0.2 c) 0.02 d) 0.002
29. If the Young’s moduli of the wires are YA, YB, YC respectively, then
a) YA ˃ YC ˃ YB b) YA ˂YB˂YC c) YA ˃ YB ˃ YC d) YB ˂YA ˂ YC
30. What is the power of a Crane which lift a mass of 270kg upwards at constant velocity of
0.1 m/s.
a) 27 watt b) 264.6 watt c) 27 HP d) 264.6 HP
