Past Papers of Physics 10th Class Lahore Board 2015 Group-I

Past Papers of Physics 10th Class Gujranwala Board 2015 Group-II
 PHYSICS GROUP-I (OBJECTIVE TYPE)
TIME ALLOWED: 15 MINUTES MAX. MARKS: 10

NOTE: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with marker or pen ink. Cutting or filling two or more circles will result in zero mark in that question.
1. In vacuum all electromagnetic waves have the same_____.
(A) wavelength
(B) Amplitude
(C) Frequency
(D) Speed

2. The relation between velocity, frequency and wavelength of a wave is
(A) V = ƛ / ƒ
(B) V ƛ = ƒ
(C) ƒ ƛ = V
(D) V ƒ = ƛ

3. Which is an example of a longitudinal wave:
(A) Water wave
(B) Radio wave
(C) Light wave
(D) Sound wave

4. The index of refraction depends on:
(A) The object distance
(B) The image distance
(C) The speed of light
(D) The focal length

5. Capacitance is defined as:
(A) V/Q
(B) QV
(C) Q/V
(D) VC

6. Five joules of work is needed to shift 10C of charge from one place to another. The potential difference between the places:
(A) 10V
(B) 5V
(C) 2V
(D) 0.5V

7. What happens to the intensity of the brightness of lamps connected in series as more and more lamps are added:
(A) Cannot be predicted
(B) Remains the same
(C) Decreases
(D) Increases

8. The presence of a magnetic field can be detected by a:
(A) Magnetic compass
(B) Stationary positive charge
(C) Stationary positive charge
(D) Small mass

9. The cathode ray oscilloscope consists of main parts:
(A) Five
(B) Four
(C) Three
(D) Two

10. In computer terminology information means:
(A) Large data
(B) Processed data
(C) Raw data
(D) Any data

11. From which of the following you can get information almost about everything:
(A) Internet
(B) Computer
(C) Teacher
(D) Book

12. Safe limit of radiation exposure in one year is:
(A) 6 rem
(B) 3 rem
(C) 5 rem
(D) 4 rem

Past Papers of Physics 10th Class BISE Lahore 2015
PAKISTAN STUDIES (ESSAY TYPE) GROUP-I PAPER-II
TIME ALLOWED: 2:45 HOURS MAX. MARKS: 63

Note: Section-I is compulsory. Answer any THREE (3) questions from Section-II and Answer any TWO (2) questions from Section-III.

(SECTION-I)

2. Write short answers to any SIX (6) questions:
(i) Define mechanical waves and give an example.
(ii) What is the reflection of sound?
(iii) Define pitch.
(iv) Define intensity of sound and write the name of its unit.
(v) Define refraction of light.
(vi) What are the applications of lenses?
(vii) Define the simple microscope.
(viii) Define electric field lines.
(ix) Define electroscope. Describe its construction.

3. Write short answers to any FIVE (5) questions:
(i) Write two uses of capacitor.
(ii) What is difference between fixed and variable capacitors?
(iii) If 0.5 C charge passes through a wire in 10 S, then what will be value of current flowing through the wire?
(iv) Which devices are used to measure the current? Write names.
(v) Which are the sources of e.m.f? Write names.
(vi) Define Ohm. Write its symbol.
(vii) Write two advantages of parallel circuit.
(viii) Which is the principle to finding the direction of magnetic field? State it.

4. Write short answers to any FIVE (5) questions:
(i) What do you mean by step up and step down transformer?
(ii) Describe the role of deflecting plates in cathode ray oscilloscope.
(iii) What do you mean by NOT gate? How does it work?
(iv) What do you mean by information and communication technology?
(v) How a fax machine works?
(vi) Write name of four output devices of a computer.
(vii) Describe two safety precautions to avoid hazards of radiations.
(viii) How fission chain reaction is controlled?

Note: Attempt any THREE questions.
5.
(a) Define simple harmonic motion an prove that motion of mass attached with spring have simple harmonic motion.
(b) Calculate the frequency of a so7nd wave of speed 340ms 1 and wavelength 0.5 m.
6.
(a) Draw ray diagram to show the formation of image in the normal human eye.
(b) An object and its image in a concave mirror are of the same height, yet inverted, when the object is 20 cm from the mirror. What is the focal length of the mirror?
7.
(a) Write a note on Coulomb’s law.
(b) The resistance of a conductor wire is 10 M. If a potential difference of 100 V is applied across its ends, then find the value of current passing through it in mA?
8.
(a) Explain deflection of electrons by electric and magnetic fields.
(b) A step down transformer needed to convert a mains 240V supply into a 12 V supply. If there are 2000 turns on the primary coil, then find the number of turns on the secondary coil.
9.
(a) How radioisotopes are used as tracers and in medical treatment?
(b) What are the risks of ICT to society and environment.

(PART-III)

Note: Attempt any TWO questions.
(A)
(i) Write down the procedure to determine the path of ray light in prism.
(ii) Define power of lenses.
(B)
Find equivalent resistance, when three resistances are combined in parallel. Draw circuit diagram and find current passing through each resistance, when:
R1 = 4KΩ, R2 = 3KΩ, R3 = 6KΩ and V = 12v
(C)
(i) Draw truth table for Nor gate.
(ii) Write the procedure to trace the path of magnetic field by bar magnet.