CLICK HERE TO BECOME A MEMBER OF HOUSE OF PHYSICS
B.Sc. Physics Past Papers of Electricity (Paper B , Section-II) University of Sargodha
Click Here to DOWNLOAD past papers of Electricity (B.Sc. Physics, Paper B, Section-II)
B.Sc. Physics Past Papers of Electricity (Paper B , Section-II) University of Sargodha
Click Here to DOWNLOAD past papers of Electricity (B.Sc. Physics, Paper B, Section-II)
 B.Sc. Mechanics (Physics)(In accordance with syllabus of UNIVERSITY OF THE PUNJAB AND UNIVERSITY OF SARGODHA) CLICK THE LINK TO DOWNLOAD |
 B.Sc. Waves and Oscillations(In accordance with syllabus of UNIVERSITY OF THE PUNJAB AND UNIVERSITY OF SARGODHA) CLICK THE LINK TO DOWNLOAD |
 B.Sc. Thermodynamics(In accordance with syllabus of UNIVERSITY OF THE PUNJAB AND UNIVERSITY OF SARGODHA) CLICK THE LINK TO DOWNLOAD |
 B.Sc. Electricity and Magnetism(In accordance with syllabus of UNIVERSITY OF THE PUNJAB AND UNIVERSITY OF SARGODHA) CLICK THE LINK TO DOWNLOAD |
 B.Sc. Electronics(In accordance with syllabus of UNIVERSITY OF THE PUNJAB AND UNIVERSITY OF SARGODHA) CLICK THE LINK TO DOWNLOAD |
 B.Sc. Modern Physics(In accordance with syllabus of UNIVERSITY OF THE PUNJAB AND UNIVERSITY OF SARGODHA) CLICK THE LINK TO DOWNLOAD |
Click the LINK to Subscribe our YouTube Channel HOUSE OF PHYSICS
University of Sargodha
B.Sc. 1st Annual 2015
Q # 3: (a) What is electric dipole? Calculate the electric field at the bisector point at the distance x due to dipole.
(b) The nucleus of iron atom has a radius of about m and contains 26 protons. Calculate the magnitude repulsive force between two of the protons.
(c) What will be the value of flux if the surface encloses negative charge?
Q # 4: (a) Define and prove Gauss’s law and write its integral and differential form.
(b) A Gaussian surface in the form of cylinder of radius R immersed in a uniform electric field E, with the cylinder axis parallel to the field. What is the flux of the electric field through this closed surface?
(c) How does the gravitational and electric force resemble each other? How do they differ?
Q # 5: (a) Define electric potential and its unit. Calculate the electric potential from electric field.
(b) A wire 4 m long and 6 mm in diameter has a resistance of 
. A potential difference of 23 V is applied between the ends. What is current density?
. A potential difference of 23 V is applied between the ends. What is current density?Q # 6: (a) Discuss the growth of charge in RC circuit also calculate the current.
(b) A capacitor discharge through resistor. After how many time constant does the stored energy fall to one half of its initial value?
(c) Show that the product RC has the dimension of time.
B.Sc. 1st Annual Exam 2014
Q # 3: (a) What is electric dipole? Find the electric field at a point on the bisector plane due to dipole.
(b) An infinite line of charge produces the field at a distance of 1.92 m. Calculate the linear charge density.
(c) Do electrons tend to go to region of high potential or low potential?
Q # 4: (a) Derive the formula to calculate the electric potential due to a point charge and collection of point charges.
(b) What is the electric potential at the surface of the gold nucleus? The radius of the surface of the gold nucleus is 7 fm and atomic number is 79.
(c) Can two equipotential surfaces intersect each other?
Q # 5: (a) Define capacitance. Show that capacitance of a cylindrical capacitor depends upon the radii of inner and outer spheres.
(b) What is the capacitance of the earth viewed as an isolating conducting sphere of radius 6370 km?
(c) What type of energy is stored in the capacitor?
Q # 6: (a) Discuss the growth of charge in RC series circuit and the expression of current which is used to charge the capacitor.
(b) The capacitor C discharges through the resistance R. After how many time constants does the charge drop to half of its initial value?
(c) Under what circumstances can the terminal potential difference of a battery exceed its emf?
ہمیں اس کار خیر کو بہتر بنانے کےلئے آپ کی مدد کی ضرورت ہے۔اپنی قیمتی آراءاور نوٹس ای میل کریں یا فیس بک ایڈیس پر میسیج کریں۔
والسلام : محمد علی ملک، گورنمنٹ ڈگری کالج نوشہرہ
B.Sc. 1st Annual Exam 2013
Q # 3: (a) Define dipole and dipole moment. Calculate the relation for torque and potential energy of an electric dipole when it is placed in electric field.
(b) An electric dipole consists of charges +2e and -2e separated be 0.78 nm. It is in electric field strength 
. Calculate the magnitude of Torque on the dipole, when the dipole moment is (i) parallel to (ii) antiparallel to the electric field.
. Calculate the magnitude of Torque on the dipole, when the dipole moment is (i) parallel to (ii) antiparallel to the electric field.(c) A point charge is moving in an electric field at right angle to the lines of force. Does any force act on it.
Q # 4: (a) What is electric potential? Find the electric potential at a point P on the axis of charge disc.
(b) The potential at the center of a uniformly charged circular disc of radius 
is 
. What is the total charge on the disc?
is . What is the total charge on the disc?(c) Define equipotential surfaces. What is the potential difference between two points on an equipotential surface.
Q # 5: (a) Derive the relation for energy stored in an electric field of charged capacitor, also calculate energy density.
(b) An isolated conducting sphere whose radius is 685 cm has a charge 1.25 nC. What is energy density at the surface of sphere?
(c) What is dielectric and what is the effect of dielectric on capacitance of capacitor?
Q # 6: (a) Discuss decay and growth of charge in RC circuit.
(b) A capacitor of capacitance C is discharging through a resistance R. In terms of time constant 
, when will its charge be one half of its initial value?
, when will its charge be one half of its initial value?(c) What do you mean by a node in DC circuit and state Kirchhoff’s node rule?
B.Sc. 1st Annual Exam 2012
Q # 3: (a). What is an electric dipole? Discuss the motion of dipole in the external electric field. Also calculate work done and energy stored in the dipole.
(b) A proton is placed in a uniform electric field D. What must be the magnitude and direction of the field if the electrostatic force acting on the proton is just to balance its weight?
(c) A point charge is moving in an electric field at right angle to the lines of force. Does any force act on it.
Q # 4: (a). Define electric potential and calculate electric potential due to a dipole.
(b) What must be the magnitude of an isolated positive charge for the electric potential at 15 cm from the charge to be 120 V?
(c) How can you ensure that the electric potential in a given region of space has constant value?
Q # 5: (a) Define capacitance? Calculate the capacitance of a cylindrical capacitor.
(b) A parallel plate capacitor has circular plate of 8.22 cm radius and 1.31 mm separation. Calculate the capacitance and what charge will appear on each plate if a potential difference of 1116 V is applied.
(c) Water has high value of dielectric constant, why is it not used as a dielectric material in capacitor?
Q # 6: (a) Discuss decay of charge in RC series circuit. Calculate current and define time constant of the circuit.
(b) When 115 V is applied across 9.66 m long wire, the current density is 1.44 
. Calculate the conductivity of the wire material.
. Calculate the conductivity of the wire material.(c) Under what circumstances would you want to connect batteries in parallel and in series?
Students of B.Sc. Physics must DOWNLOAD and STUDY following PDF Books
B.Sc. Mechanics (Physics)
B.Sc. Waves and Oscillations
B.Sc. Thermodynamics
B.Sc. Electricity and Magnetism
B.Sc. Electronics
B.Sc. Modern Physics
