Class 10 Physics 2018

Paper preparation becomes easy for any exam if you have past papers available with you. By analyzing past papers, a student feels very much satisfied with his future exam. We have solved the Class 10 Physics 2018 Past Paper in this post.

We are quite hopeful that students of the Federal Board, BISE Lahore, BISE Rawalpindi, BISE Multan, BISE Sargodha, BISE FSD, BISE GRW, BISE Sahiwal, BISE BWP, and all the other educational boards, will take advantage of this post.

Class 10 Physics 2018 (Local) Paper

Section A

Q1. MCQs

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Section B

Q2.

(i) Write down any three common properties of Longitudinal and Transverse waves.
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(ii) If the time for 20 vibrations is 100 seconds then find:
a.   Time period         
b.   Frequency
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(iii) Explain briefly the transmission of radio waves.
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(iv) Define the following:
a. Reverberation
b. Acoustics
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(v) Find the sound intensity if the sound level is 80 dB.
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(vi) If the length of a simple pendulum is ‘4’ times, what will be the change in its time period?
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(vii) If a high voltage power line fell across your car while you were in the car. Why should you not come out of the car?
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(viii) Does each capacitor carry equal charge in series combination? Explain briefly.
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(ix) Write down any three properties of electric field lines.
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(x) Name any three uses of oscilloscope.
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(xi) Name two factors, which can enhance the thermionic emission and also define thermionic emission.
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(xii) What are radio Isotopes? Give two examples.
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(xiii) How much of 1 gram sample of pure radioactive matter would be left undecayed after four half lives.
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(xiv) The 14 – C : 12 – C ratio in the fossil bone is found to be 1/4 th that of the ratio in the bone of living animal. The half life of 14 – C is 5730 years. What is the approximate age of the fossil?
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(xv) Can current flow in a circuit without a potential difference?
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Ans. According to Ohm’s law V=IR. If the potential difference (V) is zero, then the current passing through the circuit is also equal to zero.

Section C

Attempt any Two Questions

Q3. a. Draw ray diagram of the following:                       (2+2+2)
(i)         Simple Microscope
(ii)        Compound Microscope 
(iii)       Telescope
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Q3. 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?  (04)
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Q4. a. Define Resistance and also prove that R=ρL/A
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Q4. b. A step-down transformer has a turn ratio of 1:100. An AC voltage of level of amplitude 170 volts is applied to primary coil. If the current in the primary coil is 1 mA then what is the current in secondary coil?    (04)
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Q5. a. Define Generator, A.C Generator and also draw labeled diagram to illustrate the structure and working of A.C Generator.   (1+1+4)
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Q5. b. By applying a potential difference of 10 volts across the conductor, a current of 1.5A passes through it. How much energy would be obtained from the current in 2 minutes?   (4)
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Class 10 Physics 2018 (Overseas) Paper

Section A

Q1. MCQs Click HERE for MCQs Practice Tests.

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Section B

Q2.

(i) Prove that v=f λ
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(ii) Differentiate loudness and intensity of sound.
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(iii) Why the voice of women is more shrill than that of men?
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(iv) Define the following terms of lens:
a. Principal axis
b. Optical centre
c. Power of lens
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(v) Why is the driver’s side mirror in many cars convex rather than plane or concave?
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(vi) Why do we use a refracting telescope with a large objective lens of a large focal length?
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(vii) What is the difference between variable and fixed capacitor?
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(viii) Describe briefly electrostatic air cleaner.
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(ix) Differentiate between electromotive force and potential difference.
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(x) Why ammeter is always connected in series with circuit?
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(xi) Does a fuse in a circuit control the potential difference or the current?

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(xii) State Faraday’s law of electromagnetic induction.
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(xiii) Can a transformer operate on direct current?
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(xiv) What is a supercomputer?
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(xv) Make a truth table of:
a. AND gate   
b. OR gate
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Section C

Attempt any Two Questions

Q3. a. Define Nuclear fission reaction and fission chain reaction. Differentiate between controlled and uncontrolled fission chain reaction.     (1+2+3)
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Q3. b. If the length of copper wire is 1 m and its diameter is 2mm then find the resistance of this copper wire. (Resistivity of wire is 1.69 x10-8 Ωm).  (04)
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Q4. a. Define C.R.O. Draw the labeled diagram of C.R.O. Explain the working of different parts of C.R.O.      (1+2+3)
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Q4. b. Calculate the intensity level of the faintest audible sound in decibel.          (04)
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Q5. a. Explain the following properties of the wave with reference to the ripple tank experiment:      (2+2+2)
(i)   Reflection                       (ii)  Refraction                       (iii) Diffraction
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Q5. b. A sound wave has a frequency of 2 kHz and a wavelength of 35cm. How long will it take to travel 1.5 km?
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