Mashaal Masha
Mashaal Masha
 Oct 16, 2022
0
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Choose the correct options for the following questions.
Alternating current can be transmitted:
Difficulty: Easy
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A:
To long distance
B:
At very high cost
C:
At very low cost
D:
Both a and c
Alternating current is produced by a voltage source which polarity:
Difficulty: Easy
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A:
Remains the same
B:
Reverse after every time interval T/2
C:
Keeps on reversing with time
D:
Both b and c
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Nowadays, most of the electrical energy is produced by A.C generators using:
Difficulty: Easy
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A:
Hydal water
B:
Geothermal energy
C:
Solar energy
D:
Biomass
The time interval during which the voltage source changes its polarity once is known as:
Difficulty: Easy
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A:
Time period
B:
Half the time period
C:
Quarter the time period
D:
Two third of the time period
The most common source of alternating voltage is:
Difficulty: Easy
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A:
Motor
B:
Transformer
C:
AC generator
D:
Both a and c
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The output V of an A.C generator at any instant is given by:
Difficulty: Easy
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A:
$V=V_{o} sin \omega t$
B:
$V=V_{o} sin \frac{2\pi}{t} T$
C:
$V=V_{o} sin \frac{2\pi}{t} t$
D:
Both a and c
Using $\theta=\omega t$ and $\omega=\frac{2\pi}{T}$, the angle through which the coil of A.C generator rotates, when t=T/2 is:
Difficulty: Easy
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A:
0
B:
$\frac{\pi}{2}$
C:
$\pi$
D:
$\frac{3\pi}{2}$
Using $V=V_{o} \sin \omega t$ and $\omega=\frac{2\pi}{T}$, the value of alternating voltage V when t=3T/4 is:
Difficulty: Easy
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A:
$V_{o}$
B:
$-V_{o}$
C:
V=0
D:
Both a and b
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The wave form of alternating voltage is the graph between:
Difficulty: Easy
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A:
Voltage along x-axis and time along y-axis
B:
Current and time
C:
Voltage along y-axis and time along x-axis
D:
Voltage and current
The waveform of alternating voltage is a:
Difficulty: Easy
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A:
Square
B:
Rectangle
C:
Saw-tooth
D:
Sinusoidal

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