Draw a curve of binding energy per nucleon as a function of mass number. With the help of this curve, explain the process of fission and fusion.

Calculate the mass defect and binding energy per nucleon for a lithium

nucleus 

Mass of lithium nucleus (M) = 7.000000 u

Mass of proton (mp) = 1.007825 u

Mass of neutron (mn) = 1.008665 u

1 u = 931 MeV

Classify the following particles as Baryons, Mesons and Leptons:

µ,   νe,  Σ+, Λ, p, K+, n^0,  π+

State giving reasons, which of the following reactions are possible?

i)  

ii)  

iii)  

The half-life of radon  is 3.82 days. How long will it take for 60 percent of a sample of radon to decay?

An X-ray tube operates at 40 kV. Calculate the minimum wavelength of the emitted rays.

Write down the wave functions (i) Ψ₂₁₀ and (ii) Ψ₃₀₀ for the hydrogen atom. Obtain the expectation value of r for the ground state hydrogen atom.

Calculate the expectation value of the kinetic energy of a simple harmonic oscillator in its ground state.

The eigenvalues and eigenfunctions of a quantum mechanical operator A are denoted by a_n and Ψ_n respectively. If f(x) denotes a function that can be expanded in the powers of x, show that:

The quantum mechanical wave function for a particle is given by

.

Determine (i) The normalization constant A and (ii) the most probable position of the particle.

An electron microscope uses an electron beam of energy 1.0 keV. Can this microscope be used to obtain the image of an individual atom? (The size of an atom ≈ 10^-10 m.)

Using Heisenberg’s Uncertainty Principle explain whether a particle trapped inside a one dimensional box of finite length can be at rest.

 Two spacecrafts A and B moving in opposite directions are each approaching the moon with speeds of 2.2 × 10⁸ ms^-1 and 2.5 × 10⁸ ms^-1 , respectively, as observed by an observer on the moon. Calculate the speed of A with which it is

(i) approaching the moon, and

(ii) approaching B, as observed by an observer in A.

Show that when the kinetic energy of a relativistic particle is equal to its rest energy, the speed of the particle is ~ 0.866c

Neutral hydrogen atoms are moving along the axis of an evacuated tube with a speed of 2.0 × 10⁶ ms^-1 . A spectrometer is arranged to receive light emitted by these atoms in the direction of their forward motion. This light, if emitted from resting hydrogen atoms, would have a measured wavelength of 486.13 nm. Calculate the expected wavelength for light emitted from the approaching atoms, using the relativistic formula.

A spacecraft travels past Earth and Mars in a straight line at a speed v = 0.8c at an instant when Earth and Mars are 2.4 × 10¹¹ m apart; the distance being measured in the fixed frame of reference in which Earth and Mars are at rest. How far apart are Earth and Mars in the frame of the spacecraft? In the frame of the spacecraft, how much time elapses between the spacecraft crossing Earth and the spacecraft reaching Mars?

نیچے دیے گئے لفظ کو حروف میں توڑیے۔

میں 

مصلحت

ایک پیشکش 

III

طلاق

چہارم 

شاطر

وی 

امکان 

سوال 4

نیچے دیے گئے غلط جملوں کو درست کیجیے۔ (15)

مالا مال ہو جاؤ دولت سے علم کی۔

سورج ڈوبتا ہے مغرب میں۔

سراغ لگا سکو گے تم کیا اس کا۔

میں 

روشن کرواند ھیرا کہ ہے بہت شمع

وی 

عادت بیچ ڈالو کی بولنے۔

(حصہ ب)

سوال 3

۔ نیچے دیے گئے حروف کو جوڑ کر لفظ بنائیے۔

= + + d + f + l + ہو گیا۔ 

1+ه+ر+ی+ل+ II 

= +1+b+f III 

= F + L + N + 1 + K + IV 

T + k + l + ی + v = V

Ahmad shies away from prayer. Dollars are needed to buy a car. Bombay is a famous city of India. Will have to go to Sitapur to consult Qasim. Sara's favorite color is pink. Remember the lesson before the teacher arrives. Why do you like smoking cigarettes? The drunkard got severe punishment. Conflict is a bad thing. Have respect between friends and enemies. The red dress gives beauty to the bride. Choo aaye to tale product. Didi, please bring my handkerchief. Bazaar went to find its lock and key. Mama cried without any reason. Please copy Tara. Give today's dose to Baba. Geeta pee coca cola. The king wasted his bananas. Give Gala goal to Rita.

نیچے دیے گئے سبھی لفظوں کے املا کو درست کیجیے :

1

ہونٹ smacking 

11

گلاجت

III

دو لوگ 

چہارم 

anime 

جاٹر 

ہم 

مقام 

عیش و آرام 

.VII

قبضہ کر لیا 

VIII

IX

طریکا

زیلدی