Solved question paper for PHY May-2018 (DIPLOMA 1st-2nd)

Physics

Previous year question paper with solutions for Physics May-2018

Our website provides solved previous year question paper for Physics May-2018. Doing preparation from the previous year question paper helps you to get good marks in exams. From our PHY question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

These Questions are downloaded from www.brpaper.com You can also download previous years question papers of 10th and 12th (PSEB & CBSE), B-Tech, Diploma, BBA, BCA, MBA, MCA, M-Tech, PGDCA, B-Com, BSc-IT, MSC-IT.

Print this page

Question paper 1

  1. SECTION-A

    Q1. a) Fill in the blanks.

    i. The dimensional formula of energy is ----------------.

    Answer:

  2. ii. Number of fundamental and base units in S.I system is---------------.

    Answer:

  3. iii. A temperature of 100 C is equal to-------------- on Kelvin scale.

    Answer:

  4. iv. Momentum is the product of mass and -----------.

    Answer:

  5. v. Sound is a --------- wave.

    Answer:

  6. b) State True or False.

    vi. Rolling is a combination of rotational and translation motion.

    Answer:

  7. vii. Friction can be reduced to zero.

    Answer:

  8. viii. One Fermi is equal to 10-15m

    Answer:

  9. ix. Air is heated by radiation.

    Answer:

  10. x. Angular velocity is defined as rate of change of displacement of a body.

    Answer:

  11. c) Multiple Choices.

    i. The significant figures in 96.000 are

    a) 3 b) 4 c) 5 d) 6

    Answer:

  12. ii. Rate of change of Momentum is directly proportional to

    a) Force b) Displacement c) Acceleration d) Velocity

    Answer:

  13. iii. Ultrasonic waves are produced by

    a) Piezo electrical oscillator b) Coloumb’s law c) Doppler’s effect d) Gauss’s law

    Answer:

  14. iv. Action & Reaction do not balance each other because they

    a) Act on same body b) Do not act on same body c) Are in opposite direction d) Are not equal.

    Answer:

  15. v. The velocity of sound is maximum in

    a) Air b) Vaccum c) Steel d) Water

    Answer:

  16. SECTION-B

    Q2. Attempt any six questions.

    a. Convert 1 Newton of force into dyne using dimensional analysis

    Answer:

  17. b. Differentiate between Echo and Reverberation time.

    Answer:

  18. c. Define Crest, trough, wavelength, compression and rarefaction.

    Answer:

  19. d. State different modulus of elasticity.

    Answer:

  20. e. Differentiate between scalar and vector quantities.

    Answer:

  21. f. Explain coefficient of viscosity and give its unit.

    Answer:

  22. g. What are the different modes of transfer of heat?

    Answer:

  23. h. Define pressure and give its units.

    Answer:

  24. SECTION-C

    Attempt any three questions.

    Q3. State and explain law of conservation of energy.

    Answer:

  25. Q4. a) Define Friction, give its unit and explain laws of friction.

    b) A fly wheel of radius 42cm is revolving with a speed of 120r.p.m. Find its angular and linear velocities.

    Answer:

  26. Q5. a) Define free, forced and resonant vibrations

    b) Melting point of gold is 10630 C. Find its value in degree Fahrenheit and degree Kelvin

    Answer:

  27. Q6. a) Check the correctness of the relation t = \(2 \pi \sqrt ({l \over g})\) where t is time period of pendulum , l is length and g is acceleration due to gravity. b) Explain different system of units.

    Answer:

  28. Q7. State and explain Newton’s laws of motion.

    Answer:

Question paper 2

  1. SECTION-A

    Q1. a) Fill in the blanks.

    i. Relative permittivity of air is……………

    Answer:

  2. ii. Frequency of direct current is…………………

    Answer:

  3. iii. ………… mirror is used as a rear view mirror in vehicles.

    Answer:

  4. iv. Output of He-Ne laser is a …………… wave.

    Answer:

  5. v. ………. are majority carriers in p-type semiconductor.

    Answer:

  6. b) State True or False.

    vi. Dielectrics decrease the capacity of parallel plate capacitor.

    Answer:

  7. vii. EMF is the difference of potential between two electrodes in open circuit.

    Answer:

  8. viii. In a microscope, focal length of objective lens is greater than eye-piece.

    Answer:

  9. ix. Total internal reflection (TIR) is used in optical fibers.

    Answer:

  10. x. Zener diode is used in stabilizing the circuits

    Answer:

  11. c) Multiple choice questions.

    i. A well cut diamond appears bright due to

    a. It emits bright light b. scattering of light c . total internal reflection d. it emits luminous particles.

    Answer:

  12. ii. Electric lines of force at positive point charge are

    a. circular anti-clockwise b. radial outward c. circular clockwise d. radial inward

    Answer:

  13. iii. Two resistances of 9 Ω and 18 Ω are connected in series. Equivalent resistance is

    a. 20 Ω b. 27 Ω c. 9 Ω d. 2 Ω

    Answer:

  14. iv. To increase the range of an ammeter, we used to connect a suitable

    a. low resistance in parallel b. low resistance in series c. high resistance in parallel d. high resistance in series

    Answer:

  15. v. LASER is based on the principle of

    a. total internal reflection b. refraction c. population inversion d. spontaneous emission

    Answer:

  16. Q2. Attempt any six questions.

    a. An object is placed at 35 cm from a concave mirror of focal length 70 cm. Determine the position and nature of image formed.

    Answer:

  17. b. What is total internal reflection (TIR)? Explain one of its applications.

    Answer:

  18. c. Write the properties of electric lines of force.

    Answer:

  19. d. What are the differences between EMF and potential difference of a cell?

    Answer:

  20. e. State Lenz’s laws in electromagnetic induction.

    Answer:

  21. f. State Kirchoffs laws.

    Answer:

  22. g. What is depletion layer in p-n junction?

    Answer:

  23. h. What is population inversion?

    Answer:

  24. SECTION-C

    Attempt any three questions.

    Q3. State and prove Gauss law.

    Answer:

  25. Q4. Derive lens formula for thin convex lens in case of real image.

    Answer:

  26. Q5. a) 3 equal resistances are arranged in series and then they are arranged in parallel. Find out the ratio of Rs/Rp where Rs is equivalent resistance in series and Rp is equivalent resistance in parallel

    b) State Ohm’s law. What is the effect of temperature on resistance of conductor?

    Answer:

  27. Q6. Explain principle, construction and working of moving coil galvanometer.

    Answer:

  28. Q7. a) Differentiate between n-type and p-type semiconductors.

     

    Answer:

  29. b) What is Ruby laser? Explain its working with diagram.

    Answer: