Inter (Part-II) Multan Board 2013
Physics
Part II (Objective Type)
Time Allowed: 20 Minutes 
Max. Marks: 17

Note: You have four choices for each objective type question as A, B, C and D. The choice which you think is correct; fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

Question #1
Circle the correct option i.e. A/B/C/D. Each part carries one mark.

The unit of electric field strength is

(A) Newton
(B) Coulomb 
(C) Joule/Coulomb 
(D) Newton/Coulomb

Cathode ray oscilloscope works by deflecting a been of:

(A) protons
(B) Atomes
(C) Electrons
(D) Neatrons

Two long parallel wires carrying currents in the same direction wall :

(A) Repel each other
(B) Attract each other
(C) Remain at rest
(D) Start rotating

The fact that electric produces magnetic field was discovered by:

(A) Newton
(B) Maxwell
(C) Henry 
(D) Oersted

When the back emf in the generator is maximum it draws :

(A) Maximum current
(B) Steady current
(C) Zero current
(D) None

In pure positive A.C circuit the interleneous  values of current and voltage are:

(A) In phase 
(B) Perpendecular
(C) Out of phase
(D) May or may not be in the phase

If r m I =10A then will be

(A) 14.2 A 
(B) 1.42 
(C) 142A 
(D) 0.142A

The process of converting Alternating Current into Direct Current is known as:

(A) Amplification 
(B) Reflection 
(C) Filtration  
(D) All of these

In n-p-n Transistor current does not flow in the direction from:

(A) Emitter to collector
(B) Emitter to base 
(C) Base to collector 
(D) Collector to emitter

The value of Plank’s constant h is equal to

(A) 6.63 x 10^-34 js
(B) ….
(C) 6.63 x 10³¹ js 
(D) 6.63x 10³⁴ js

The rest of mass of Photon is:

(A) Zero 
(B) mc²
(C) m.. 
(D) m

Which nuclear reaction takes place I the Sun and Stars?

(A) Fission 
(B) Chemica 
(C) Fusion 
(D) Mechanical

Cancer of the Thyroid gland is cured by:

(A) Carbon-14 
(B) Sodium-24 
(C) Iodine-131 
(D) Cesuim-137

The flow of charge through uniform cross section wire in a unit time is called:

(A) Current 
(B) Charge 
(C) Powet 
(D) Ampere

The S.I unit of strain is:

(A) Nm 
(B) Nm^-2
(C) No unit 
(D) kgms^-1

The potential required to remove an electron from the atom is called:

(A) Critical potential 
(B) lonization potential
(C) Absolute potential 
(D) Eccitation V

The electric force of repalsion between two electrons at a distance of lm is:

(A) 1.8N
(B) 1.5x10^-9 V
(C) 2.30 x 10^-28N
(D) 2.30 x 10^-30N                                                                                                                                   

Inter (Part-II) Faisalabad Board 2013
Physics
Part II (Subjective)
Time Allowed: 2.10 Hours 
Max. Marks: 83 

Section I

Q2.   Attempt any eight parts             8 x 2 = 16   

• The potential court ant throughout a given region of space. Is the electrical field zero or Non-zero in this region
• Suppose that you follow an electric field line due to positive pair charge. Do electric field .8,nd the potential increase or decrease?
• Define Electric Intensity with its units.
• Write least two properties or Electric Field Lines.
• A plane conducting loop is located in a uniform magnetic field that is directed along, the x-axis. For what orientation of the loop is the flux a maximum? For what orientation, is a minimum!
• Suppose that charge q is moving in a uniform magnetic force that acts on charge q?
• Draw a diagrarn of current measuring part of Avometer.
• Discribe the function of Grid in CRO.
• Does the induced l EMF sit a circuit depend on the resistance of the circuit'? Does induced induced current depend on the resistance of the circuit?
• Does the induced ernf always act to decrease the magnetic flax through a circuit?
• What is Bad emf effectt in motor'?
• State Faraday's law of electromagnetic induction.

Q3. Attempt any eight parts.                  8 x 2 = 16   

• Give statements of Kirchhoff 2nd rule.
• A charge of 90 coulomb passes through a wire in one hour and fifteen rninutes.
• Draw circuit diagram of wheat Stone Bridge and write down its balancing condition
• How the reception of a particular radio station is selected on your radio set?
• Name the device that will:- (a) permit flow of D C but oppose the flow of A.C (b) permit flow of A.0 but not the D.C
• Define impedance circuit and give its unit.
• What is Coercivity of a Material?                                                                                                                                                                                                              
• Differentiate between ductile and brittle substances. Give an. example for each.
• What is meant by Para and Ferromagnetic Substance?
• What is Potential  Barrier? What is the value of of Potential Barrier of Si and Ge?
• Draw the symbolic diagram of OR Gate and write its truth table.
• Thy anode of a positive with respect to its Cathode. Is it forward biased?

Q4. Attempt any six parts.                     6 x 2 = 12

• Will the Bright light eject more electrons forrn a metal surface than dimmer light of same colour?
• What are the measurements on which two observers in relative  motion will always agree upon?
• Why do not we observe a Compton effect with visible light?                                                                                                                                                                        
• Is  energy conserved when an atom emits a Photon of light?
• Give two laser of medicine and industry.                                                                                                                                       
• What do you understand by "background radiation." State two sources of this radiation.
• A particle which produces more ionization is less penetrating why?
• Give the names and charges of any four Quarks.
• Why moderators arc used in the core of nuclear reactor?

SECTION-II
NOTE: - Attempt any three questions.

Question #5
(a) Suite Gauss's Law and Law electric intensity due to an infinite sheet of charge.
(b) The potential difference between the terminals. of a battery in open circuit is 2.2 volts, When it is connected across a resistance of 5.0Ω potential falls to 1.8 volt, Calculate the current and the internal resistance of battery.

Question #6
(a) What is an inductor? Drives the relation for energy stored in a inductor.                                                                                     
(b) A power line 10.0rn high caries a current 200 A. Find the magnetic field of  the wire at the ground

Question #7
(a) Explain  phase relationship between Voltage and current when an A.C source is connected across a capacitor. Also derive the relation for reactance of a capacitor.
(b) A wire 2.5m long and cross section area 10-5m2 is stretched by 1.5mm by a force 100 N. Calculate Toung’s Modulus

Question #8
(a) Write down the postulates of special theory of relativity. Write a note on consequences of this theory.
(b)The current flowing into the base of a transistor in 100µA. Find the collector current lc its emitter current IE and the ratio IC/IE. If the value of current gain β is 100

Question #9
(a) Explain the production of X-rays by suitable diagram.
(b) Find the energy associated with the following reaction.
¹⁴ ₇ N + ⁴₂ He → ¹⁷₈O + ¹₁H