231.
A.
I
B.
II
C.
III
D.
V
Correct answer is D
Latent heat or specific latent heat = L
| Heat | energy | = | mL | or | L | = | H
m |
= | energy
mass |
232.
A.
1
B.
0.8
C.
0.65
D.
0.4
Correct answer is D
m = 500kg, W = mg = 500 × 10 = 5000N
F = 2000N
| μ | = | Force at constant velocity
weight |
= | 2000
5000 |
= | 0.4 |
233.
A.
52°C
B.
50°C
C.
49°C
D.
46°C
Correct answer is B
C\(_{\theta}\) = 50, C\(_0\) = 2, C\(_{100}\) = 100
| θ | = | C\(_{\theta}\) - C\(_0\)
C\(_{100}\) - C\(_0\) |
× | 100 | = | 51 - 2
100 - 2 |
× | 100 |
| = | 49
98 |
× | 100 |
θ = 50°C.
234.
The resultant capacitance in the figure above is
A.
0.4μf
B.
0.8μf
C.
1.8μf
D.
4.5μf
Correct answer is B
For the parallel arrangement = 2 + 4 = 6μf
| For | the | series | arrangement | = | 1
C\(_T\) |
= | 1
2 |
+ | 1
3 |
+ | 1
6 |
+ | 1
4 |
| 1
C\(_T\) |
= | 15
12 |
| C\(_T\) | = | 12
15 |
= | 0.8μf |
235.
A.
yield point
B.
proportionality point
C.
deformation point
D.
elastic point
Correct answer is A
-yield point is where a small increase in load produces a large extention.
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