51 Most Important Question Bank of Physics for Maharashtra HSC Board Exam 2018

Physics Important Question Bank 2018

1.What do you mean by centripetal force?
2.Show that period of a satellite revolving around the Earth depends upon the mass of the Earth.
3.Explain why an astronaut in an orbiting satellite has a feeling of weightlessness.
4.Explain What is Doppler effect in sound and state its applications.
5.Define emissive power and coefficient of emission of a body.
6.A solid cylinder of uniform density of radius 2cm has mass of 50g. If its length is 12cm, calculate its moment of inertia about an axis passing through its Centre and perpendicular to its length.
7.Define linear S.H.M. Show that S.H.M. is a projection of U.C.M. on any diameter.
8.Prove that root mean square velocity of gas molecule is directly proportional to the square of its absolute temperature.
9.Explain the formation of stationary waves by analytical method.
10.Derive an expression for excess pressure inside a drop of liquid.
11.Obtain the differential equation of linear simple harmonic motion.
12.A metal sphere cools at the rate of 4C/min. When its temperature is 50C. Find its rate of cooling at 45C if the temperature of surroundings is 25C.
13.State the first law of Thermodynamics.
14.Derive Laplace’s law for spherical membrane of bubble due to surface tension.
15.Find the kinetic energy of a 2kg rolls on a table with linear speed of 3m/s.
16.State the theorem of parallel axes and theorem of perpendicular axes about moment of inertia.
17. Derive an expression for acceleration due to gravity at depth D below the earth’s surface.
18.The spin dryer of a washing machine rotating at 15rps slows down to 5rps after making 50 revolutions. Find the angular acceleration.
19.The total energy of free surface of a liquid drop is 2pi (22/7) times the surface tension of the liquid. What is the diameter of the drop?
20.Draw a labelled diagram for a liquid surface in contact with a solid, when the angle of contact is acute.
21.What are forced vibrations and resonance? Show that only odd harmonics are present in an air column vibrating in a pipe closed at one end.
22.Explain how moving coil galvanometer is converted into a voltmeter
23.What is diffraction of light? Explain its types.
24.Distinguish between paramagnetic and ferromagnetic substances.
25.Describe the construction of photoelectric cell.
26.Obtain an expression for the radius of Bohr orbit for H-atom.
27.Distinguish between the phenomenon of interference and diffraction of light.
28.Write a short note on surface wave propagation of electromagnetic waves.
29.State the principle on which transformer works. Explain its working with construction.
30.With the help of a labelled diagram, describe the Geiger-Marsden experiment. What is mass defect?
31.Explain what is a transmitter.
32.Explain what is a receiver in communication system.
33.An unknown resistance is place in the left gap and resistance of 50 ohm is placed in the right gap of a meter bridge. The null point is obtained at 40cm from the left end. Determine the unknown resistance.
34. Draw a labelled diagram of Davisson and Germer experiment.
35.Explain self-induction and mutual induction.
36.What are alpha and beta parameters for a transistor? Obtain relation between them.
37.Describe Kelvin’s method to determine the resistance of galvanometer by using metre bridge.
38.State Ampere’s circuital law. Obtain an expression for magnetic induction along the axis of toroid.
39.State the advantages of potentiometer.
40.Explain the elementary idea of an oscillator with the help of block diagram.
41.Draw a labelled diagram of a receiver for the detection of amplitude modulated wave.
42.Describe the biprism experiment to find the wavelength of the monochromatic light. Draw the necessary ray diagram. Also, the width of plane incident wavefront is found to be doubled on refraction in the denser medium. If it makes an angle 65 degree with the normal, calculate the refractive index for the denser medium.
43.Explain with a neat diagram, how a p-n junction diode is used as a half wave rectifier.
44.A cube of marble having each side 1 cm is kept in an electric field of intensity 300V/m. Determine the energy contained in the cube of dielectric constant.
45.What is critical velocity? Obtain an expression for critical velocity of an orbiting satellite. On what factors does it depend?
46. Explain the construction and working of Nicol prism.
47.State and prove Gauss’ Theorem in Electrostatics.
48.With the help of a neat diagram, describe the construction and working of Van de Graff generator.
49.State Kelpler’s laws of planetary motion.
50. Define practical simple pendulum.
51.Draw the schematic symbols for AND, OR NOT and NAND gate.

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