H.S Exam 2013 Physics Question Paper (Bengali Version )

Submitted by vink0108 on Thu, 09/04/2014 - 13:41

2013

PHYSICS

Time: 3 Hours 15 Minutes]                                                                                               [Full Marks: 80

Instructions to candidates:

Special credit will be given for answers which are brief and to the point.

Marks will be deducted for spelling mistakes, untidiness and bad handwriting.

Figures in the margin indicate full marks for the questions.

GROUP – A

1. Answer the following questions either in one word or in one sentence (Alternative

are to be noted):                                                                                                           1 x 10 = 10

a) What is the angular speed of second hand of a watch?

b) Define universal gravitational constant.

OR

Magnitudes of acceleration due to gravity at a height h and at a depth x from the

earth’s surface are the same. Write down the relation between x and h (x and h

are very small in comparison to the radius of the earth).

c) Can light wave be longitudinal?

d) The equation of a progressive wave is y=A sin (kx – ωt). What is the maximum

value of velocity of a particle on the wave?

OR

The wavelength of a wave is 2m.What is the phase difference between two points

on a wave separated by 1m in the medium?

e) How much work is done in moving q coulomb of charge between two points

separated by a distance r on an equipotential surface?

OR

Fill in the blanks:

The surface density of charge of a charged conductor placed in air is σ. Electric

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