VIRUDHUNAGAR DISTRICT
10th SCIENCE Physics English medium ONE MARK TEST
பத்தாம் வகுப்பு அறிவியல் இயற்பியல் ஆங்கில வழி ஒரு மதிப்பெண் வினாக்கள்
1. Where should an object be placed so that a real and inverted image of the same size is obtained by a convex lens
f
2f
infinity
between f and 2f
2. Unit of radio activity is
Becquerel
Roentgen
Curie
all of the above
3. James chadwick discovered
protons
electrons
neutrons
positrons
4. The value of universal gas constant
3.81 J /mol K
8.03 J /mol K
1.38 J / mol K
8.31 J /mol K
5. If a substance is heated or cooled, the change in mass of that substance is
positive
negative
zero
none of these
6. SI unit of resistance is
mho
joule
ohm
ohm metre
7. Among visible light _______ has the lowest wavelength
red
green
Indigo
violet
8. 1 gram force equal to
8.9 dyne
9.8 dyne
980 dyne
890 dyne
9. Kamini reactor is located at
kalpakkam
koodankulam
Mumbai
Rajasthan
10. Velocity of sound in a gaseous medium is 330 m/s. If the pressure is increased by four times without causing a change in the temperature, the velocity of sound in gas is
330 m/s
660 m/s
156 m/s
990 m/s
11. The filament in electric bulbs are made up of
cadmium
tungsten
Mercury
none of the above
12. Newton's third law is applicable-----
for body is at rest
for your body in motion
both a and b
only for bodies which equal masses
13. _________ bulb has no filament
electric bulb
LED
fluroscent
none of the above
14. Temperature is the average _________ of the molecules of a substance
difference in K.E and P.E
sum of K.E and P.E
difference in T.E and P.E
difference in K.E and T.E
15. Power of a lens is-4D, then it's focal length is
4m
-40m
-0.25m
-2.5m
16. Velocity of sound in the atmosphere of a planet is 500 m/s. The minimum distance between the sources of sound and the optical to hear the echo, should be
17 m
20 m
25m
50m
17. If a substance is heated are cooled, the linear expansion occurs along the axis of
X or -X
Y or -Y
both a and b
a or b
18. A small bulb is placed at the principal focus of a convex lens . when the bulb is switched on, the lens will produce
a convergent beam of light
a divergent beam of light
a parallel beam of light
a coloured beam of light
19. Inertia of a body depends on
weight of the object
acceleration due to gravity
both a and b
mass of the object
20. The eye defect 'presbyopia'can be corrected by
convex lens
concave lens
convex mirror
bi focal lenses
21. To project the rockets which of the following principles are required
Newton's third law of motion
Newton's law of gravitation
law of conservation of linear momentum
both a and c
22. The CGS unit of force is
Newton
kilogram
dyne
none of the above
23. Velocity of sound is maximum in
solids
liquids
gases
all the above
24. The frequency, which is audible to the human ear is
50 kHz
20 kHz
15000 kHz
10000 kHz
25. Kilowatt hour is the unit of
resistivity
conductivity
electrical energy
electrical power
26. ________ isotope used for the treatment of cancer
radio iodine
radio cobalt
radio carbon
radio nickel
27. PV =constant, is the expression for_________ law.
Charles
Boyle
avogadro
Newton
28. ________aprons are used to protect us from Gama radiations
lead oxide
iron
lead
aluminium aluminium
29. Artificial radioactivity was discovered by
Becquerel
Irene Curie
Roentgen
Neils Bohr
30. Rapid back and forth motion of a particle about its mean position is called
frequency
vibration
wavelength
speed
