DAILY TEST 1 TERM
2
SUBJECT : PHYSICS
CLASS : X
Fill in
the blank
1.
The
specific heat capacity of a substance is………………..
2.
Heat
is………………..
3.
Thermal
capacity is………………..
4.
A
copper block of mass 0.1 kg and specific heat capacity 390 J/kg0C.
the thermal capacity of copper is…………….
5.
The
specific latent heat of fusion is………………….
6.
The
specific latent heat of vaporization is………………….
7.
Melting
point is…………
8.
Freezing
point is……………
9.
Conduction
is……….
10. Convection is…………….
11. Insulator is………..
12. Conductor is…………….
13. Radiation is…………..
14. Electric fields is…………….
15. Current is…………….
16. The unit of current is………..
17. The unit of specific heat
capacity is…..
18. The unit of heat is………….
19. Direct current is…….
20. Alternating current is…….
21. The unit of charge is……….
22. If the themperature of 5 kg of
material of specific heat capacity 400 J/kg0C rises from 5 0C
to 15 0C , the heat received
is……………………
23. If the heat of material of specific heat capacity 400 J/kg0C
is 1000 Jolues to rise themperature from 5 0C to 15 0C.
the mass of material is……………..
24. The heat to change 10 gram water
at 1000C to steam at 1000C is……………
( specific heat latent os steam is 2300 J/g)
25. The heat lost by ice in falling
from 00C – 50C is………………………
(
the specific heat capacity of ice is 2.0 J/g0
26. The heat lost by water at 00C
freezing to ice 00C is………….
(
specific latent heat of ice is 340 J/g)
27. The heat lost by water in falling
from 150C to 00C
is………..
(
specific heat capacity of water is is 4.2
J/g0C)
28. Heat received or given out
is……………………………x …………………………………….x……………………………..
29. Thermal capacity
is…………………………………………….x………………………………………………….
30. When an object is called negatively
charge, it means……………………..
Essay
1.
If the themperature of 10 kg of material of
specific heat capacity 400 J/kg0C rises from 20 0C to 300C
, calculate the heat received
2.
How much heat is needed to raise the
themperature by 100C of 5 kg of a substance of specific heat
capacity 300 j/kg0C.
3.
It takes 487.5 J to heat 25 grams of copper from 25 °C to 75
°C. What is the specific heat in Joules/g·°C? ( 0.39)
4.
What is the heat in Joules required to melt 25 grams of ice?
What is the heat in calories?
Useful information: heat of fusion of water = 334 J/g = 80 cal/g (8350 k)
Useful information: heat of fusion of water = 334 J/g = 80 cal/g (8350 k)
5. What is the heat in Joules required to raise the temperature
of 25 grams of water from 0 °C to 100 °C? What is the heat in calories?
Useful information: specific heat of water = 4.18 J/g·°C ( 4.18 J = 1 calorie )
Useful information: specific heat of water = 4.18 J/g·°C ( 4.18 J = 1 calorie )
(2500)
6. What is the heat in Joules required to convert
25 grams of -10 °C ice into 150 °C steam?
Useful information:
heat of fusion of water = 334 J/g
heat of vaporization of water = 2257 J/g
specific heat of ice = 2.09 J/g·°C
specific heat of water = 4.18 J/g·°C
specific heat of steam = 2.09 J/g·°C
Useful information:
heat of fusion of water = 334 J/g
heat of vaporization of water = 2257 J/g
specific heat of ice = 2.09 J/g·°C
specific heat of water = 4.18 J/g·°C
specific heat of steam = 2.09 J/g·°C
(78360 J or 78.36 kJ.)
7. What is the heat in Joules required to convert
100 grams of -5 °C ice into 10 °C water?
Useful
information:
heat of fusion of water = 334 J/g
heat of vaporization of water = 2257 J/g
specific heat of ice = 2.09 J/g·°C
specific heat of water = 4.18 J/g·°C
specific heat of steam = 2.09 J/g·°C
heat of fusion of water = 334 J/g
heat of vaporization of water = 2257 J/g
specific heat of ice = 2.09 J/g·°C
specific heat of water = 4.18 J/g·°C
specific heat of steam = 2.09 J/g·°C
8.
How
much heat is needed to change 20 gram of ice at 00C to steam 1000C?
9.
If
the current through a floodlamp is 10 A, what charge passes in :
a.
2
s
b.
10 minutes
c.
60
minutes
d.
An
hour
10. What is the current in a circuit
if the charge passing each point is :
A.
20
C in 3 s
B.
50 C in 1
minutes
C.
1000
C in an hour
D.
10000
C in a day
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