Inter (Part-II) Bahawalpur Board 2016
Physics
Part II (Objective Type)
Time Allowed: 20 Minutes 
Max. Marks: 17

Note: Four possible choice A . B , C , D to each question are given. Which choice is correct fill that circle in front of the question number use marker or pen to fill the circle cutting or filling two or more circle wile result in zero mark in the

• When Nitrogen is bombarded by Alpha Particles, Nitrogen Nucleus change into:

(A) Oxygen (O)
(B) Carbon (C)
(C) Barium (Be)
(D) Helium (He)

• Subatomic Particles are divided Into groups :

(A) Photon
(B) Leptons
(C) Hadrons
(D) All these

• Production of X - rays can be regarded as the inverse of:

(A) Compton Effect
(B) Pair Production
(C) Photoelectric Effect
(D) Annihilation of Matter

• Compton shift In Wave Length ( ) Is zero when scattered angle of photon is:

(A) 90°
(B) 140°
(C) 0°
(D) 45°

• Truth Table of Logic Function

(A) Summarizes its output values only
(B) Tabulates all its input conditions only
(C) Display all its input and output possibilities
(D) Is not base on logic algebra

• A two inputs NAND gate with inputs A and B has an output 0 , if

(A) B is zero
(B) A is zero
(C) Both A and B are 1
(D) Both A and B are 0

• Substances which undergo plastic deformation until they break are known as

(A) Brittle Substance
(B) Ductile Substance
(C) Nan - Magnetic Substance
(D) Magnetic Substance

• A.C. through inductor, the applied voltage :

(A) Loads the current by /2
(B) Lags the current by /2
(C) And Current are in phase
(D) And Current are out of phase 180^o

• The slope of q-t curve at any instant of time gives:

(A) Current
(B) Voltage
(C) Charge
(D) Both A and 0

• If the speed of rotation of a generator is doubled the output voltage will be:

(A) Remain Same
(B) Double
(C) Four Time
(D) One Half

• Mutual induction has a practical role in the performance of the :

(A) Radio Choke
(B) Transformer
(C) A.C Generator
(D) D.C. Generator

• A proper Combination of a galvanometer and a series of resistance acts as:

(A) Voltmeter
(B) Ammeter
(C) Ohmmeter
(D) Digital multimeter

• Useful device to measure resistance current and voltage is an electronic instrument called :

(A) Voltmeter
(B) Ammeter
(C) Ohmmeter
(D) Digital multimeter

• A certain wire has a resistance R, the resistively of an other wire of an identical material with the first, except for twice its diameter is :

(A) R
(B) 4 R
(C) 2 R
(D) Same as R

• An ECG records the — between points on human skin generated by electric process in the heart :

(A) Heart Beat
(B) Pulse Rate
(C) Pressure
(D) Voltage

• The constant of proportionality. K . depend upon

(A) Nature of medium between two charges.
(B) The system of units
(C) Nature of charge bodies
(D) Nature of medium between two charge and system of units.

Inter (Part-II) Bahawalpur Board 2016
Physics
Part II (Subjective Type)
Time Allowed: 3.10 Hours 
Max. Marks: 83

Note: It is compulsory to attempt any (6) parts, from Q.No.2. And (8 -8) parts each from Q.Ne.3 and Q.No.4 Attempt any 03 questions from part II while attempt part III (practical part) according to given instruction write same question No. and its part no. as given in the question paper.

 Make diagram where necessary. Part I 2x2=44

Question #2

• When does light behave as a wave? When does It behave as a piratical?
• What advantages an electron microscope has over an optical microscope?
• We do not notice the deBrogile Wave - Length Inc a pitched cricket ball, explain why?
• Is energy conserved when an atom emits a photon of light?
• If you swallowed an Alpha Somas and Beta Source xe which would be the more dangerous to you? Explain why?
• What factors makes a fusion reaction difficult to achieve?
• What is Spectroscopy?
• What do you understand by Radio Activity?
• Why we heavy nuclei unstable?

Question #3

• What are the difficulties in testing whether the filament of a lighted bulb obeys Oboeys Law?
• Why does the resistance of a conductor rise with temperature?
• What are non-ohmic devices/ Give an example.
• How does doubling the frequency affect the reactance of (i) An Inductor (ii) A Capacitor
• How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50 Hz source?
• Explain the conditions under which electromagnetic waves an produced from a source.
• What are Paramagnetic Substances? give an example.
• Distinguish between intrinsic and extrinsic Semi Conductors.
• What do you know about Photo-voltaic Cell?
• Why a photodiode is operated in reverse biased state?
• Differentiate between Insulator and conductors.
• Why is the base current in a transistor very small?

Question #4

• How can you identify that which parts of a capacitor is positively charged?
• Why capacitance of a parallel plate capacitor increase. in the presence of dielectric?
• Four unmarked wires emerge from a transformer. What Steps would you take to determine the bun ratio?
• Why does picture on T.V. Screen become distorted when a magnet Is brought near the screen?
• How can a current Ioop be used a determine the presence of a magnetic held in a given region of space?
• It is possible to change both thy area of the loop and magnetic field passing through the loop and still have no induced emf In the loop? Explain briefly.
• What is lorenetz,s force? Express it ventrally
• Why the resistance of an ammeter should be very low?
• Show that and have same units
• What is back motor effect in generators?
• What is potential gradient
• Electric lines of force never cross why?

Part II

Question #5
(a) What is Nuclear Fission? Explain fission Chain Reaction in detail. (5)
(b) Find the speed of electron in the first both Orbit  (3)

Question #6
(a) What is Transistor? explain Transistor as an Amplifier. (5)
(b) What is the energy of a Photon it a bean of Infrared radiation of Wavelength 1240 nm. (3)

Question #7
(a) Describe RLC Series Circuit and Carive the relation for resonance frequency and write down at least two of its properties. (5)
(b)A 1.25 cm diameter Cylinder is subject. to a load of 2500 kg.Calculate the stress on bar in mega Pascal’s. (3)

Question #8
(a) State and explain the phenomenon of mantel induction. Also define Herry (5)
(b) How fast must a proton move in a magnetic field of 2.50 x 10^-3 T such that magnetic force is equal to its weight?  (3)

Question #9
(a) State Gauss's Law and find electric intensity due to an Infinite sheet of charge by applying Gauss's Law. (5)
(b) Calculate the terminal potential difference of each cell in the circuit of given fig. (3)

PART-III PRACTICAL PART

Give answers to any four questions 4 x 2 = 8

Question #10

(a)

• Define Ohm’s Law. Write it’s mathematical form
• Differentiate between Galvanometer and Ammeter.
• What is Farad? Define it.
• What is Potentiometer? Why it is more accurate than other such devices?
• What is meant by Internal Resistance?
• What is Photocell? Write its one application,
• Write down truth Table of NOT gate
• What is Neon Flash Lamp? For what purpose it is used?

(b) Write down the brief procedure to find the resistance of a Wire by Slide Wire Bridge.

OR

Write down the brief procedure of the experiment to find out relation between Current Passing through Tungsten Filer-en: lamp and the Potential Applied Across it.

Question #10

(c) Answer the questions given below on the basis of following graphs. 2 x 2 = 4

(Graph - A)

 (i) What do you infer from Graph? (ii) Find no the Slope of Graph.

OR

(Graph B)

(i) What do you infer from Graph? (ii) Find out resistance of a Galvanometer from Graph.