

Important Guess Papers
Inter Board Karachi (Science) 20112012
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Class 2nd Year Physics
Guess Paper Science 
Important Numericals:
 A Carnot Engine whose low temperature reservoir
is at 200K has an effeciency of 50%. It is desired
to increase this to 75%s. by how much degrees must
the temperature be decressed, If higher temperature
of the reservoir remains constant?
 A photon of Wavelength 4x1013m in the vicinity
of a heavy nucleus produces an electronpositron pair.
Find the Kinetic Energy of each particle if the kinetic
enrgy of positron is twice of the electron?
 A copper wire of 1.571 x 10(power2)m is used as
a shunt in an ammeter of range 5amp which is obtained
by modifying a galvanometer of resistance 19.8 ohm.
if the radius of copper wire is 2mm then calculate
the current which produce full scale deflection in
galvanometer. (for copper resisitivity is 1. x 10
8?
 A capacitor of 200PF is charged to a potential of
100 volts. its plates are then connected in parallel
to another capacitor and is found that potential difference
between the plates falls to 0 valts. What is the capacitance
of the second capacitor?
 What is the e.m.f. of the cell when a resistance
of 2ohms is connected across the terminals of a cell,
the current is 0.5A, but when the resistance across
the cell is 5ohm the current is 0.25 A?
 Sodium (11Na23) has an atomic mass of 22.989u. find
the total binding energy of the sodium nucleus and
estimate the binding energy per nucleon?
Important Questions:
Chapter 11:
 Molar specific heat
 CpCv=R
 B=3a
 1st law of thermodynamics (with processes)
 2nd law of thermodynamics
 Describe Isobaric and Adiabatic process with graphical
representation?
 Equate the clausius and kelvin statements
 Equate the entropy and 2nd law of thermodynamics
 Define coefficient of Linear and Cubical expension
with unis. Also show that coeffecient of linear expension
is equal to the one third of coeffeient of cubical
expension?
 P=1/3pV2
 K.E is directly proportional to Temperature
 Prove acoccording to the KMT that (P is inversly
proportial to 1/v), PV=nRT
Chapter 12:
 Gauss's law and (its prove)
 Application of the Gauss's law (spherical charged
shell, infinite sheet of charges, two oppositively
charged plates)
 Factors effecting on the capacitance of the capacitor
 Electric Flux
 Capacitors (in series and parallel)
 Coulumb's law
Chapter 13:
 Resistivity
 Temperature coefficient
 e.m.f with its derivation
 Resistance (in series and parallel)
 Ohm's law with its limitation
Chapter 14:
 F=Bsintheta
 JJ Thomson's Experiment
 Derivation for B, A.C generator
 Laws of electromagnetic induction
 Mutual Induction
 Self Induction
 Ampere's circular law with ots application
 Lenz's law
 Magnetic flux
 Motional e.m.f
 F=qvB
 Power loss in transformer
Chapter 15:
 Galvanometer
 Ammeter and Voltmeter
 Factors effecting on the sensitivity of the galvanometer
 Voltmeter
 Wheat stone bridge
 Construction and working of galvanometer
Chapter 16:
 Diode as a rectifier
 P type, n type
 Semi conductor
 Forward bias, Reversed bias
 Band theory
Chapter 17:
 Compton effect
 Theory of relativity with its consequence
 Einstien results for the photo electric equation
Chapter 18:
 Derivation of enrgy level diagram
 Bohr's Xray production
 Laser, ruby laser
Chapter 19:
 Exponential equation of the radioactive decay
 Law of radioactive decay
 Half life
 Fission and fusion
 Nuclear reactor
 Mass defect
 Binding Energy
Chapter 20:
 Geiger mular counter

Guesspapers Inter Board
Karachi for Class XI, XII, (1st, 2nd Year) Science,
Arts and Commerce Group Exams Guess Papers 2011, 2012,
Karachi, Pakistan 



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