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VITEEE 2010 Solved Paper
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© examsnet.com
Question : 27
Total: 120
Using an AC voltmeter the potential difference in the electrical line in a house is read to be 234 V. If line frequency is known to be 50 cycles/s, the equation for the line voltage is
V
=
165
sin
(
100
π
t
)
V
=
331
sin
(
100
π
t
)
V
=
220
sin
(
100
π
t
)
V
=
440
sin
(
100
π
t
)
Validate
Solution:
E
=
E
0
sin
ω
t
Voltmeter read rms value
∴
E
0
=
√
2
×
234
V
=
331
V
and
ω
t
=
2
π
n
t
=
2
π
×
50
×
t
=
100
π
t
Thus, the equation of the line voltage
E
=
331
sin
(
100
π
t
)
© examsnet.com
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