University of Kafrelsheikh .-;' \ Date: 17-1-2011Faculty of Science ,

~Time allowed: 2H

Level: 2nd year \ Full Mark: 70 Marksa \

\Subject: EM Theor ~,-"I"":j Final ExamStudent Name: ..:.~~::.:=~~.'·V Academic No.:--

Answer the following questions:!

La An infinitely long line is positively and uniformly charged with a constant 10Markslinear charge density (i/. Use Gauss' Law to find the electric field aboutthe line.

1.b An infinitely long wire caries a constant current 1. Use Amperes law to 10Marksrind the magnetic field about the wire.

Write short notes about: Divergence of E, Divergence of B, and Curl of H I 20MarkS-]

Wnte short notes about: The Wave EquatIon for EM Waves m Vacuum 10M~rkJ

2.a

Fj3.-a-~-vv--rl-t-e-a-b-o-u-t-:-S-c-a-la-r--a-n-d-V-e-c-t-o-r-P-o-t-en--ti-a-ls---------------------------.-l-O-M--a-rl-\s-'

\3b 10Markswrite about: Electromagnetic Antennastflertzian Dipole)

Best Wishes

Date: Sat. 22-01- 2011Time allowed: 2 HoursFull Mark: 70 marksFinal ExamAcademic No. :

University of KafrelsheikhFaculty of ScienceLevel: 2 nd yearSubject: AC circuitStudent Name:

Answer the following questions:-

1~a) Prove that: The total impedance of the parallel alternating circuits have 15 Marks~

maximum value at the resonance and show that how used this phenomena in the

applied application.

l-b)

2-a)

2-b)

Two resistances have the values Rl = 3.5 KQ ,R2 =l.5 KQ connected as a

series with alternating current source have voltage amplitude 500 mV and its

frequency 10 K cycles/sec. 1)Calculate the amplitude of the current and its

effective value, 2) calculate the voltage difference on both the resistances .

10 Marks

Prove that: For alternating current circuits the dissipative power (real power)

= apparent power x power Coefficient.

15 Marks

10 MarksCoil connected as a series with a resistance, the applied alternating voltagethrough them have a value = 200 volt and its frequency = 50 Hz the currentpass through them = 5 amp. and the dissipative power through them have avalue 800 watt . Calculate 1) Value of the resistance (R) , 2) Value of the selfinductance (L)r---~r-~--~~~'~----~~---------------------------------------+~~~-~

3 Write about: Schering Bridge 8 Marks

4 Write about: Low pass filter and for RLC filter, Calculate: The gain (T), 12 Marks

Resonance frequency (fo), the cut of frequency (fe), and the quality factor (Q)

Best Wishes Dr. M. El-Saadawy

UNIVERSITY OF kafr el sheikhDepartment of PhysicsAcademic Year 2010-2011

Semester I - Paper I - Properties of MatterDuration of Examination: 1 hrsMaximum Marks: 35

PROPERTIES OF MATTER Examination

Question: 1

Discuss the representation of Simple Harmonic Motion.

Question: 2

A 5 Kg mass oscillating with amplitude of 25 cm when attached to spring of forceconstant 125 N.m-1 •

Find A - the period.B - The maximum speed.

C - The speed when the displacement from the equilibrium is 20 cm.D - The kinetic and potential energies at those points

Question: 3

Discuss the following topics1 - Young's modulus2 - Bulk modulus3 - Modulus of Rigidity

Question: 4

Discuss the molecular theory of surface tension.

•

University of Kafrelsheikh

Faculty of ScienceLevel: 1"1 year

Subject: HeaL

Student Name:

)j~r

Dale: 2:~-1-2011

Time allowed: 11I

Full Mark: ;$5 Marks

Final Exam

Academic No.:

Answer the following qucstions.l

1.a Define the Io llow ing concepts}:

Heat, Internal energy, Heat capacity, Specific heat capacity, Calorific

theory, An isolated system, An open system, A closed system, Cyclic

process, Latent heal of fusion.

Best Wishes

l.b Show how to find the thermal conductivity of"Cl good conductor].

5 Marks

10 Marks

2.a Prove that: Po _. PII( I -I- l' (j) where, (I is the density of the liquid, () is the 10 MarkstemperaLure and -i is the volume cx pu ns ion coefficient.

2.b By using the method of mixtures, show how to determine the specific heat 10 Markscapacity of a solid'

••

~I fo ~l.:?-

r#l41Sw~·Atl ~~~...)':!:"W r-

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2011 11/24 ~'il : ~J\.lll.201112010 ~~I rt"J.! ,2011 .):!W:! .)JJ -(~~) 207 U OJ\..QU~\

th f 11A tnswer e 0 owing ques IOns.Degree

IS 1 a Write short notes on the following:Conservation theorem for the linear momentum of a particle.Conservation theorem for the angular momentum of a particle.Conservation theorem for the angular momentum of a system ofparticle.

10 b Show that for a single particle with constant mass the equation ofmotion implies the following differential equation for the kineticenergy:

dT = F.udt

While if the mass varies with time the corresponding equation isdmT

=F.pdt

10 c Two points of mass m are joined by a rigid weightless rod oflength fJ. , the centre of whIch is constrained to move on a circleof radius a. set up the kinetic energy in generalized coordinates.

20 2 a Derive the Euler equationaj _~ aj =0 , where j is a known function of the indicateday dx ayx

dy(x) , y( x) but the dependence of y on x isvariables x, Yx =dx

not fixed.IS b Two parallel coaxial wire circles to be connected by a surface of

minimum area that generated by revolving a curve y(x) about thex-axis. The curve is required to pass through fixed end points(x., YI) ,(x2, Y2)' The variational problem is to choose the curve

y(x) so that the area of the resulting surface will be a minimum.

10 Deduce an equation for y(x).c Write short notes on Hamilton's principle.

10 d Using the Lagrangian equations of motion describe a movingparticle in cylindrical coordinates (z=O)- plane.

Kafrelshiekh University

Faculty of Science

Physics Department

, I c.v

Chemistry and Zoology

2nd Level

Biophysics Examination

Student Name: .

Academic No. : .

Answer the following Questions:

1. Describe the following:

a) Propagation of action potential.

b) Thermocouple.

Time Allowed 2 hours

Total Mark 70

27 January 2011

Code "" w

(25 Marks)

(12)

(13)

2. Give short account on the following:

a) Methods of interaction of radiation with matter. (15)

(45 Marks)

b) Main components of X-ray unit. (15)

c) Methods of detection of nuclear radiation. (15)

@ With best wishes @

Dr. Said Mohamed Attia

(~.)j) 215 U :~JW\

~~-':A" /f'~ 4t.:i :~\f~··t~il\U~~: 6AY\

2011 ;1/27 ~\ : ~.)tJ\

~\fo~~

I"~\~W ~.At\ ~s:- ••~ r--

Answer the following questions.Degree20 1 a

Which give the wavenumber of the light emitted as aresult from electronic transition between two energylevels in the atom. Derive this equation.

15

10

In studying of the spectrum of atomic hydrogen Bohrused two assumptions to derive the equation

v=R (_1 __ 1 )co 2 ,2n n

b Explain Moseley's experiments showing how X-rayscan be produced.

c The deuteron has approximately twice the mass of theproton. Calculate the difference in the wavelength ofthe Balmer- a line in hydrogen and deuterium. ForBalmer- a line n = 2, n' = 3. R; = 10973731.568525 m-I,

(me / Mp)= 1118362 a Derive the relation between the impact parameter and

the scattering angle in Rutherford's experiment, thenshow how can you get the nuclear radius.

20

15

10

bUsing Millikan's oil drop experiment show in detailthat the charge is quantized.

c In Millikans oil drop it was found that an oil fallingfreely between two horizontal plates 5mm distance

apart, with velocity 2.26 x 10-4 m / s. When applying apotential 1600 V the oil raised with uniform velocity

O.90x10-4 m/so Calculate the oil radius and its charge.

Air viscosity is 1.80 x 10-5 N s m -2 and oil density is

900 kg / m3• Cancel air density relative to oil density.

------- -

Kafrelshiekh University

Faculty of Science

Physics Department Biophysics Examination

Physics Program

2nd Level

Time Allowed 2 hours

Total Mark 7019 January 2011Code '1'" ••....•

Student Name: .

Academic No. : .

Answer the following Questions:

1. Describe the following:

a) Electricity effect in the Bone. (12)

(25 Marks)

b) Decay law and the radio-activity of the radioactivematerial. (13)

2. Give short account on the following: (45 Marks)•a) The physical methods of measuring temperature. (15)" .

b) Main components of X-ray unit. (15) •

c) Method of producing heat in the human body. (15)

@ With best wishes @

Dr. Said Mohamed Attia

t

Physics department v ~

>~

Kafrclshcikh university

Faculty of science

Second level Date :15/1/2011

physics Time: 2 h

Thermodynamics Marks: 70

u204

Answer the flowing guestions~1- define .Specific weight, property and the zeroth law of thermodynamics. ( 10 )

- Show that the Clausius and Kelvin-Plank statements of the second law ofthermodynamics are equivalent. ( 10 )

2 - Prove that the efficiency of carnot engine depend on the absolute temperature ofhigh and low reservoirs. ( 10 )

- Calculate the work done in the constant pressure, constant volume, isothermal andadiabatic quasiequilibruim processes for an ideal gas. ( 10 )

3- Convert 178 kPa gage of pressure to absolute millimeters of mercuryP = 13.6p("l: water ). ( 8 )

- A rigid vessel with a volume of 10 rn'' contains a water-vapor mixture at 400 kf'a at60 percent quality. The pressure is lowered to 300 kf'a by cooling the vessel. Find mg atsiate2. (7)

4 - Steam is contained in a 4-L volume at a pressure of 1.5 MPa and atemperature of 400 QC.If the pressure is held constant by expanding the volume while20 k.I of heat is added, find the final temperature. ( 7 )

3- A paddle wheel provides 200 k.I of work to the air contained in a 0.2-m rigidvolume, initially at 400 kPa and 40°C. Determine the entropy change if the volume iinsulated. ( 8 )===~=~~==========================================================

With my best wishesDr. M. R. Eraky

f\~ r# J~;;'~;~ ~;I

Kaf~iekh University

Faculty of Science

Physics Department

\ J \")

Physics Program

2nd Level

Time Allowed 2 hours

Total Mark 7016 January 2011

Code '1'./\ UComputer Language (1)

Student Name: ,•.. , . (in Arabic)

Academic No. : .

Answer the following Questions in the sgme sheet!

1. Describe the name and the function of each part of the following (15 Marks)

window:

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2. (A): Write the name and the function of each of the following icons on (45 Marks)

the tool bar: (22.5 Marks)

Name Function

1.

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(B): Write the name and the function of each of the following icons on the

tool box: (22.5 Marks)

1. ·Irt

2. . .

3. A

4. jaol

5.

6. 0 .

7. p: .

8. •

9.

10 ~

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13 e;14 g

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3 Write down the codes for a program (to Add, Subtract, Multiply, and

Divide) two numbers through TEXT tool.

(10 Marks)

@ With best wishes @

Dr. Said Mohamed Attia

- 5 -