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. Michael Faraday belonged to:
(A) Russia
(B) K.S.A
(C) U.S.A
(D) British

2. Radio waves are:
(A) All of these
(B) Electromagnetic waves
(C) Transverse waves
(D) Longitudinal waves

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

4. 1 KB =:
(A) None of these
(B) 1024 MB
(C) 1024 KB
(D) 1024 Bite

5. Which one of the ,following is a method of energy transfer:
(A) All of these
(B) Wave motion
(C) Radiation
(D) Conduction

6. The process by which electrons are emitted by a hot metal surface is known as:
(A) Thermionic emission
(B) Conduction
(C) Evaporation
(D) Boiling

7. The formula for time period of mass spring system is:
(A) T = 2 π √(g/l)
(B) T = 2 π √(k/m)
(C) T = 2 π √(l/g)
(D) T = 2 π √(m/k)

8. S.I unit of resistance is:
(A) Joule
(B) Ohm
(C) Ampere
(D) Volf

9. The formula for focal length is:
(A) ƒ = R/5
(B) ƒ = R/3
(C) ƒ = R/4
(D) ƒ = R/2

10. The speed of sound at 0°C is:
(A) 331 ms-1
(B) 231 ms-1
(C) 376 ms-1
(D) 386 ms-1

11. Half life of carbon-14 in years is:
(A) 5760 years
(B) 5750 years
(C) 5740 years
(D) 5730 years

12. Electroscope is used for detecting:
(A) Resistance
(B) Voltage
(C) Charge
(D) Current

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) State Hook’s law.

(ii) What is meant by loudness of sound?

(iii) Calculate the frequency of a sound wave of speed 240ms.1 and wavelength 0.5 m.

(iv) Write difference between noise and music.

(v) State the difference between concave and convex mirror.

(vi) Define total internal reflection.

(vii) What is prism?

(viii) How can be identified conductors and insulators with help of electroscope?

(ix) What is meant by point charge?

3. Write short answers to any FIVE (5) questions:

(i) Write down tow uses of capacitor.

(ii) What is difference between variable and fixed capacitor?

(iii) What is the function of voltmeter and ammeter?

(iv) Define Ohm.

(v) Prove that: P = I2R

(vi) What is difference between live wire and neutral wire?

(vii) What is the difference between D.C and A.C.

(viii) What is meant by intensity of magnetic field?

4. Write short answers to any FIVE (5) questions:

(i) Write the principle of A.C. Generator.

(ii) Define electronics.

(iii) Differentiate between analogue and digital electronics.

(iv) Define telecommunication.

(v) What is Hard Disk?

(vi) What is Data Management?

(vii) Define isotopes.

(viii) Define penetrating power.

Note: Attempt any THREE questions.

5.

(a) Derive an equation of relation between speed, frequency and wavelength.

(B)  A sound wave has a frequency of 2 KHz and wavelength 35 cm. How much time will it take to travel 1.5 km?

6.

(a) What do you understand by reflection of light? Draw a diagram to illustrate reflection at a plane surface.

(B)  Find the value of critical angle for water. If the refracted angle is 90°, the refractive index

of water is 1.33 and that of air is 1.

7.

(a) State and explain Coulomb’s law.

(B)  The resistance of an electric bulb is 500Q. Find the power consumed by the bulb when,a potential difference of 250 V is applied across its ends. .

8.

(a) What do you understand by digital and analogue quantities?

(B)  A step-up transformer has a turn ratios of 1 : 100. An alternating supply of 20 V is connected across the primary coil. What is the secondary voltage?

9.

(a) Define electronic mail. Write down its three advantages.

(B)  Define and explain the nuclear fusion reaction.

(P ART-III)

Note: Attempt any TWO questions.

(A)

(i) Define critical angle.

(ii) By using the following table, find the refractive index of glass:

No. of obs.    <i           <r           Refractive index n = ?

1                    37°          22°

2                    35°          20°

3                    36°          23°

(B)

(i) Write the procedure for verification of Ohm’s law.

(ii) Draw the circuit diagram for Ohm’s law.

(C)

(i) What is “AND Gate” write its equation also?

(ii) Verify the truth table of “AND Gate”.