Pre Board Revision Test Paper 2015
Science& Technology(Physics)
Time :th
std-X
Total Marks:-70
SECTION - A MULTIPLE CHOICE QUESTION..
Q1. What is the range of wavelength of visible light in nm?
A. 8000 to 10,000 B.100 to 400 C.4000 to 7000
D.400 to 700
Q2. Carbon atoms form_______ bonds with other carbon atoms.
A.covalent
B. ionic
C. metallic D.hydrogen
Q3. An object of 4 cm height is placed at a distance of 12cm from concave mirror, the image
is form at 24cm behind the mirror, what will be the height of the image?
A.2cm
B.4cm
C.6cm
D.8cm
Q4. 10 nanometere = _________ metre.
A.10-8
B.10-7
C. 10-9
D.10-10
Q5. What is the approximate size of virus?
A.100nm
B.50 nm
C.10 nm
D. 1nm
Q6. The absolute refractive index of any medium is always____
A.1
B.>1
C.<1
D.zero
Q7. The compound microscope consists of two convex lenses of 5cm and 20 cm focal length,
then which of them will be objective and eyepiece?
A.Object lens with 20cm focal length and eyepiece with 5cm focal length.
B.Object lens with 5cm focal length and eyepiece with 20 cm focal length.
C.Both should have 20 cm focal length
D.Both should have 5cm focal length.
Q8. The resistance of one conducting wire is 10Ω. If battery is 1.5 V is connected to it, then
how much electric current will flow through it?
A. 0.15 mA
B. 1.5 mA C.15 mA
D.150 mA
Q9. Which effect of electricity is used in electroplating process?
A.Heating
B. Chemical C. Magnetic D. Mechanical
Q10.
Which of the following is the value of practical unit of electric energy used for
domestic purpose?
A. 1000 J
B. 1Ws
C.3.6×106 J D.3.6×106 kWh
Q11.
The resisivity of semi-conductor elements is____
A. less than that of conductors
B. more than that of insulators
C. less than that of conductors and insulators
D. more than that of conductors but less than insulators
Q12.
Which colour of light gets scattered maximum due to atmosphere?
A. Blue
B. Yellow C. Green
D.Red
Q13.
Which lens is used by the person having far sightedness defect? A.Convex
lens B.Concave lens
C. Cylindrical lens D.Bifocal lens
Q14.
Which of the following are primary colours?
A. Red,Blue,yellow B.
Red,Green,Violet
C.Yellow,Blue,Yellow D. Red, green,blue
Q15.
What is the equivalent resistance of a parallel connection of resistors?
A. Smaller than the smallest resistance B. Larger than the largest resistance
C. An average of all resistances
D. A summation of all resistances
Q16.
What is the thermal conductivity of copper metal at room temperature
W
inm.k?A.350 B.3500
C.385
D.3850
Q17.
What is the width of DNA?
A.2 nm
B.1 nm C.0.1 nm D.20 nm
Q18.
What is the relation between radius of curvature(R) and the focal length (f)
𝑓
of a spherical mirror ?A. R =2
B. R = f
C. R= 2f
D. R = 3f
Q19.
Which type of image of an object cannot be obtained by a convex lens?
A. Real and diminished
B. Real and enlarged
C. Virtual and diminished D. Virtual and enlarged
Q20.
Which optical phenomenon is responsible for the twinkling of stars?
A. Atmospheric reflection
B. Atmospheric refraction
C. Reflection
D. Total internal reflection
Q21.
Due to which phenomenon of light does a Tyndall effect result?
A. Reflection B. Refraction
C. Scattering D. Dispersion
Q22.
Which coloured light has minimum velocity in the glass prism?
A. Red
B. Green
C. Blue
D. Violet
Q23.
The SI unit of electric charge is___
A. ampere B. volt
C. watt
D. coulomb
Q24.
Which physical quantity has a unit, ohm?
A. Resistivity
B. Electric charge C. Resistance
D. Electric potential
Q25.
What makes the electric current to flow through an electrolyte?
A. Only free electrons
B.Only positive ions
C. Only negative ions
D. Positive and negative ions
Q26.
Of which physical quantity is the unit, ‘watt’?
A. Work B. Electric power C. Electric potentialD. Electric current
Q27.
Resistance wire used in an electric iron is made from which material?
A. Copper B. Nichrome
C. Silver
D. Aluminium
Q28.
If an electric bulb connected to 220 V line draws an electric current of 0.5 A,
then what will be the resistance of filament of this bulb?
A.110Ω
B.440 Ω
C. 11Ω
D.1100Ω
Q29.
Which is the most important property of nanomaterial ?
A. Force
B. Friction C. Pressure D. Temperature
Q30.
What is the approximate diameter of buckyball?
A. 100 mm B. 100 nm C. 10 nm
D. 1 nm
Q31.
What is the speed of light waves in vaccum?
A.3×105 ms-1
B. 3×106 ms-1
C. 3×108 ms-1 D. 3×107 ms-1
Q32.
Through which of the following points, a ray passing through a centre of
curvature (C) and reflected by concave mirror will pass?
A. Focus
B. Centre of curvature
C. Pole
D. All the given
Q33.
Who does the function to change the focal length of an eye lens?
A.Cornea B. Iris
C. Cilliary muscles D. Retina
Q34.
What is the complementary colour of blue colour?
A. Red
B.Yellow
C. Green
D. Magenta
Q35.
Where is the image in eye formed for a person suffering from defect of nearsightedness? A. On retina B. On region behind the retina
C. On region in front of retina
D. On pupil
Q36.
What is the unit of electric potential difference?
A. joule
B. coulomb C. volt
D. watt
Q37.
The SI unit of resistivity of the material is____
Ω
m
A.Ω
B. Ω m
C. m
D. Ω
Q38.
Size of nano particles range between ____ nm.
A.100 to 1000
B. 0.1 to 10 C. 1 to 100 D. 0.01 to 1
W
Q39.
Thermal conductivity of standard SWNT along its length is ____ m.k
A.3500
B.385
C.35,000
D.35
Q40.
Which of the lenses with focal length 10cm, 20 cm, 25 cm and 50 cm has
maximum power? A.50 cm B. 25cm
C.20 cm
D.10 cm
PART BSection A. Answer in short
Q1.
Explain how nanotechnology will be useful in health sector.
OR
Nanotechnology has its own exclusive rules. Explain this statement.
Q2. An electric heater consumer 4.4kW power when connected with a 220 V
line voltage, then calculate the current flowing in the heater and resistance of
the heater.
OR Differentiate between series connection and parallel connection of resistors.
Q3. Write Faraday’s laws of electrolysis.
OR Define potential difference and write its formula and units.
Q4. Explain total internal reflection with diagram
OR what is dispersion of light? Explain with diagram
Section B. Answer the following question
Ques1.
Explain the formation of rainbow with diagram.
Ques2.
What is expected to improve in near future using nanotechnology.
Ques3.
Describe Ohm’s law experiments .
OR write a note on mixing of primary colours.
Ques4.
Draw a neat diagram and write the position, nature and size of
image when the object is placed between F and O of a convex lens.
Section C. Answer in detail
Ques1.
Write a short note on compound microscope with diagram
OR Derive the mirror formula.
Ques2. Write a short note on electroplating with diagram