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AP EAMCET Engineering 2018 Apr 23 Shift 2 Paper
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© examsnet.com
Question : 96
Total: 160
A wire of 20 Ω is immersed in ice. If 10 A current is passed through this wire for 1 minute, ice completely melts. The mass of the ice is nearly
(
L
ice
=
79.7
calg
−
1
)
3.5 g
359 g
540 g
3.5 kg
Validate
Solution:
From the conservation of energy,
Heat Gain Heat Generated
m
L
=
I
2
R
t
m
=
I
2
R
t
L
Substitute values.
m
=
(
10
)
2
(
20
)
(
60
)
79.7
×
4.2
m
=
359
g
© examsnet.com
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