851.
A.
\(\frac{1}{2}\)W
B.
\(\frac{2}{3}\)W
C.
W
D.
2w
E.
3W
Correct answer is E
E = \(\frac{1}{2} Cr^2 = \frac{1}{2}(C-1 + C_2)V^2 = (3C_1)V^2\)
= 3(\(\frac{1}{2}C_1v^2\)) = 3W
852.
A.
450
B.
0.9
C.
900
D.
567
E.
43
Correct answer is C
x = 2\(\pi f L = 2\pi \times \frac{500}{\pi} \times 0.9\)
= 900\(\Omega\)
853.
A.
qvB
B.
mqvB/m
C.
mvB/q
D.
O
Correct answer is D
No explanation has been provided for this answer.
854.
A.
i only
B.
ii only
C.
i and ii only
D.
ii and iii only
E.
i, ii and iii
Correct answer is C
No explanation has been provided for this answer.
855.
A.
540.0ms-1
B.
333.3ms-1
C.
270.0ms-1
D.
166.7ms-1
E.
83.3ms-1
Correct answer is B
V = \(\frac{2x}{t} = \frac{2 \times 300}{1.8}\)
= 333.33ms-1
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