PHYSICS MOCK TEST SECTION 1

Subject: PHYSICS MOCK TEST SECTION 1 Tue Feb 10, 2009 10:56 pm

MOCK TEST

SUBJECT:PHYSICS
CLASS-X [img][/img]

Section - 1 ( 40:marks)
(Answer all questions in the section)

1.a) A unit Physical quantity is stated as Kgm2 s-2 . Name and define the unit of the Physical quantity in SI system. (2)

b)The hammer of an electric bell strikes 1440 times in one minute and does a work of 0.2 j per strike. What is the power of hammer is SI system? (2)

c)A pulley system has five pulleys in all and is 80 to efficient.Calculate (i)the M.A
(ii)the effort required to lift a load of 1000 N. (2+2)

d)Write the mathematical relationship between power, force and velocity.(1)

e)State the energy transformation taking place in photosynthesis in green leaves. (1)

2.a) If a ray of light passes from medium I to medium II without any change of direction, what can be said about the R.I. of these media.(angle of incidence is not zero.)(1)

b)Sometimes the air bubbles emerging out of a fish tank appear silvery. Name the phenomenon occurring.(1)

c)Define 'critical angle'. (1)

d)State two factors on which lateral displacement depends. (2)

e)Show by the help of a ray diagram how a stick appears to be bend, when immersed in a pool of water. (3)

f) Two isosceles right-angled prism are placed near each other as shown in the figure below. Complete the ray diagram. (Take I =42 degree). (2)

3 a) What is the main cause of dispersion of light ? (1)

b) State two properties of infra red radiations which are not true for visible light. (2)

c) Arrange the following in the order of increasing wavelength. X-rays, radiowaves,
gamma rays and microwaves. (1)

d) Name the electromagnetic wave which helps in study of structure of crystals. (1)

e) What change do you expect in the characteristics of musical sound if

i)its frequency is increased.

ii) it's amplitude is decreased.

f) What do you understand by the term quality of a musical note? (1)

g) Draw a graph between displacement from mean position and time for a body executing damped vibration.

4. a)Find the equivalent resistance across XY. (2)

b)What do you understand by 'Earthing' ? (1)

c) What is the international convention of colour coding in a cable ? (1)

d) Define the house hold unit of Electricity.

e) Explain the statement 'the potential difference between points in one volt'?

f) Draw a neat labeled circuit diagram required to verify Ohm's Law. (3)

g)State the expression for electrical energy spent, when a current I flows through a resistance R for time t. (1)

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thank u so much!!!!!!!!!!!!!!!!!!!! Like a Star @ heaven

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yup......thanxxx a LOTT!!!!!! mona

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CHECK THIS LINK FOR ALL SUBJECT PRELIMS PAPER:

http://www.thelearnweb.com/exampapersonline/search/index.php

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thnx mona

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mona n quest tnx a lot

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hey mona.........thanx.....and a big thanx to quest also Wink

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I doubt in 4(f).... is it the...I against V graph ??

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By the way Thank you mona and quest ...... i need more revision in current electricity !!! -.-